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  • Female Yosemite toad, Bufo canorus, resting in shallow water in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150272.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150216.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150241.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150256.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150259.jpg
  • Female Yosemite toad, Bufo canorus, swimming in shallow water in a high elevation meadow in California's Sierra Nevada mountains. Also in the water are tadpoles of the same species. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150286.jpg
  • Female Yosemite toad, Bufo canorus, swimming in shallow water in a high elevation meadow in California's Sierra Nevada mountains. Also in the water are tadpoles of the same species. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150290.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150248.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150244.jpg
  • Female Yosemite toad, Bufo canorus, resting in shallow water in a high elevation meadow in California's Sierra Nevada mountains. Also in the water are tadpoles of the same species.  Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150285.jpg
  • Female Yosemite toad, Bufo canorus, resting in shallow water in a high elevation meadow in California's Sierra Nevada mountains. Also in the water are tadpoles of the same species. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150293.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150205.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150215.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150227.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150236.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150243.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150267.jpg
  • Female Yosemite toad, Bufo canorus, resting in shallow water in a high elevation meadow in California's Sierra Nevada mountains. Also in the water are tadpoles of the same species. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150276.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150195.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150233.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150260.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150264.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150265.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150202.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150208.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150200.jpg
  • Female Yosemite toad, Bufo canorus, in a high elevation meadow in California's Sierra Nevada mountains. Once widespread in the high Sierra, since the 1980s Yosemite toads have disappeared or severely declined in over 50% of their former range, and now survive only in a handful of wet meadows. The toad is listed as a Species of Special Concern under the Federal Endangered Species Act as well as by the State of California, and is listed as Endangered by the IUCN.
    08150228.jpg
  • Santa Cruz garter snake, Thamnophis atratus atratus (Thamnophis couchii atratus), eating tadpole of California red-legged frog, Rana aurora draytonii, a Federally listed Threatened Species. After capturing the tadpole in deeper water, the snake brings it to shore and swallows it, then stretches its jaw before returning to the water. Foothills of Mount Diablo, California. Once abundant throughout California, red-legged frog populations have been dramatically reduced by habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs. Red-legged frogs and garter snakes have always occupied the same habitats; predation by these native snakes is not considered a significant factor in the frogs' decline.
    r943seq.jpg
  • Tadpoles of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100705-amargosa-toad.jpg
  • Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada.
    07100910-amargosa-toad.jpg
  • Tadpole of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100894-amargosa-toad.jpg
  • Tadpole of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100886-amargosa-toad.jpg
  • Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada.
    07100743-amargosa-toad.jpg
  • Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada.
    07100740-amargosa-toad.jpg
  • Tadpole of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100903-amargosa-toad.jpg
  • Tadpoles of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100865-amargosa-toad.jpg
  • Tadpole of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100852-amargosa-toad.jpg
  • Tadpoles of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100778-amargosa-toad.jpg
  • Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada.
    07100745-amargosa-toad.jpg
  • Tadpoles of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100701-amargosa-toad.jpg
  • Driveway of home in Oasis Valley, Nevada, habitat of Amargosa toad, Bufo nelsoni
    07100915-amargosa-toad-sign.jpg
  • Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada.
    07100736-amargosa-toad.jpg
  • Tadpoles of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100703-amargosa-toad.jpg
  • Tadpole of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100896-amargosa-toad.jpg
  • Foothill yellow-legged frog, Rana boylii, in the South Fork of the Eel River, Mendocino County, California
    12110135.jpg
  • Tadpoles of Amargosa toad, Bufo nelsoni.  The species is described as sensitive and imperiled by the State of Nevada and U.S. Bureau of Land Management, but is not listed as an Endangered Species.  Oasis Valley, near Beatty, Nevada
    07100706-amargosa-toad.jpg
  • Tadpole of blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060220-blue-sided-treefrog-tadpole.jpg
  • Photographers surround a blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060267-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060253-blue-sided-treefrog.jpg
  • Tadpole of blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060218-blue-sided-treefrog-tadpole.jpg
  • Tadpole of blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060215-blue-sided-treefrog-tadpole.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060232-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060223-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060250-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060243-blue-sided-treefrog.jpg
  • Tadpole of blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060213-blue-sided-treefrog-tadpole.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060258-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060245-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060233-blue-sided-treefrog.jpg
  • Photographers surround a blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060269-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060256-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060249-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060247-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060261-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060241-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060239-blue-sided-treefrog.jpg
  • Blue-sided treefrog or coffee frog, Agalychnis annae, an endangered species.  A small population has been established in the gardens of the Hotel Bougainvillea, San Jose, Costa Rica.
    09060228-blue-sided-treefrog.jpg
  • Black toad, Bufo exsul, Deep Springs Valley, California.  State-listed threatened species.
    02140088.jpg
  • Black toad, Bufo exsul, Deep Springs Valley, California.  State-listed threatened species.
    02140102.jpg
  • Black toad, Bufo exsul, Deep Springs Valley, California.  State-listed threatened species.
    02140105.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211121.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211196.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100141-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100064-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100159-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100080-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii.  Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06070008-red-legged-frog-tadpole.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211100.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100145-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100134-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100102-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100097-red-legged-frog-tadpole.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
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  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100087-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100057-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii.  Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06070010-red-legged-frog-tadpole.jpg
  • Tadpole of California red-legged frog, Rana aurora draytonii, in duckweed, Lemna sp. Contra Costa County, California. Complete life cycle available, including eggs, tadpoles, metamorphs, froglets, and adults. Red-legged frogs were once abundant throughout California, and were the inspiration for Mark Twain's classic The Celebrated Jumping Frog of Calaveras County. Now, after more than a century of habitat destruction, water pollution, suburban sprawl, and predation by non-native bullfrogs, they've been reduced to a number of scattered, unconnected populations. Federally listed as a Threatened Species.
    06100082-red-legged-frog-tadpole.jpg
  • American bullfrog, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a239-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a224-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a214-bullfrog.jpg
  • American bullfrog, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a244-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a217-bullfrog.jpg
  • American bullfrog, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a241-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a237-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a216-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a215-bullfrog.jpg
  • American bullfrogs, Rana catesbeiana, Northern California. Native to the Eastern United States, bullfrogs were introduced and have become established west of the Rockies. Bullfrogs are large, aggressive predators and prolific breeders, and have been a factor in declining native frog populations in many areas of the West. Captive frogs photographed in studio.
    a212-bullfrog.jpg