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Frogs and Toads 97 images Created 15 Apr 2012

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  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla). Mount Diablo State Park, California
    05020146-pacific-treefrog.jpg
  • Egg and newly-hatched tadpoles of American bullfrog, Rana catesbeiana.  Immediately after hatching, the tadpole is about 5mm long and still has the appearance of an embryo.
    05150031-bullfrog-tadpole.jpg
  • Egg and newly-hatched tadpoles of American bullfrog, Rana catesbeiana.  Immediately after hatching, the tadpole is about 5mm long and still has the appearance of an embryo.
    05150035-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  Immediately after hatching, the tadpole is about 5mm long and still has the appearance of an embryo.
    05150112-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  Immediately after hatching, the tadpole is about 5mm long and still has the appearance of an embryo.
    05150119-bullfrog-tadpole.jpg
  • Egg of American bullfrog, Rana catesbeiana
    05150129-bullfrog-egg.jpg
  • Tadpole of 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 seriously depleted native frog populations in many areas of the West.
    06010097-bullfrog-tadpole.jpg
  • Tadpole of 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 seriously depleted native frog populations in many areas of the West.
    06010128-bullfrog-tadpole.jpg
  • Hybrid African clawed frog, Silurana sp.  Native to sub-Saharan Africa, clawed frogs were exported worldwide in the 1940s and 1950s for use in human pregnancy tests, and were later sold widely as pets.  Feral populations are now established in many countries, including the United States, where they are a threat to native amphibians and fish.  Especially large populations exist in California, preying on endangered California red-legged frogs, Rana aurora draytonii, and endangered unarmored threespine sticklebacks, Gasterosteus aculeatus williamson.  Recent evidence suggests the chytrid fungus that is currently decimating frog populations around the world originated in Africa and was spread by these frogs.
    06050079-african-clawed-frog.jpg
  • Hybrid African clawed frog, Silurana sp.  Native to sub-Saharan Africa, clawed frogs were exported worldwide in the 1940s and 1950s for use in human pregnancy tests, and were later sold widely as pets.  Feral populations are now established in many countries, including the United States, where they are a threat to native amphibians and fish.  Especially large populations exist in California, preying on endangered California red-legged frogs, Rana aurora draytonii, and endangered unarmored threespine sticklebacks, Gasterosteus aculeatus williamson.  Recent evidence suggests the chytrid fungus that is currently decimating frog populations around the world originated in Africa and was spread by these frogs.
    06050223-african-clawed-frog.jpg
  • Hybrid African clawed frog, Silurana sp.  Native to sub-Saharan Africa, clawed frogs were exported worldwide in the 1940s and 1950s for use in human pregnancy tests, and were later sold widely as pets.  Feral populations are now established in many countries, including the United States, where they are a threat to native amphibians and fish.  Especially large populations exist in California, preying on endangered California red-legged frogs, Rana aurora draytonii, and endangered unarmored threespine sticklebacks, Gasterosteus aculeatus williamson.  Recent evidence suggests the chytrid fungus that is currently decimating frog populations around the world originated in Africa and was spread by these frogs.
    06050252-african-clawed-frog.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 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 seriously depleted native frog populations in many areas of the West.
    06070014-bullfrog-tadpole.jpg
  • Tadpole of 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 seriously depleted native frog populations in many areas of the West.
    06100003-bullfrog-tadpole.jpg
  • Tadpole of 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 seriously depleted native frog populations in many areas of the West.
    06100029-bullfrog-tadpole.jpg
  • Tadpole of 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 seriously depleted native frog populations in many areas of the West.
    06100037-bullfrog-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 American bullfrog, Rana catesbeiana, with hind legs beginning to develop. 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 seriously depleted native frog populations in many areas of the West.
    06140299-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with hind legs beginning to develop. 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 seriously depleted native frog populations in many areas of the West.
    06140305-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with hind legs. 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 seriously depleted native frog populations in many areas of the West.
    06180011.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  As it transforms into a frog, the tadpole's round mouth, adapted for feeding on plants, will gradually widen and take on a shape more suitable for a predator.  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 seriously depleted native frog populations in many areas of the West.
    06180014.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  About the time the front legs emerge, the small round mouth of the tadpole widens and transforms into that of an adult frog.  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 seriously depleted native frog populations in many areas of the West.
    06180059.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with hind legs. 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 seriously depleted native frog populations in many areas of the West.
    06180122.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with hind legs. 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 seriously depleted native frog populations in many areas of the West.
    06180128.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with four legs. 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 seriously depleted native frog populations in many areas of the West.
    06180177.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with four legs. 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 seriously depleted native frog populations in many areas of the West.
    06180183.jpg
  • Tadpole of American bullfrog, Rana catesbeiana, with four legs. 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 seriously depleted native frog populations in many areas of the West.
    06180188.jpg
  • American bullfrog, Rana catesbeiana, with partial tail. 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 seriously depleted native frog populations in many areas of the West.
    06190002.jpg
  • American bullfrog, Rana catesbeiana, with partial tail. 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 seriously depleted native frog populations in many areas of the West.
    06190022.jpg
  • American bullfrog, Rana catesbeiana, with partial tail. 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 seriously depleted native frog populations in many areas of the West.
    06190026.jpg
  • American bullfrog, Rana catesbeiana, with partial tail. 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 seriously depleted native frog populations in many areas of the West.
    06190027.jpg
  • American bullfrog, Rana catesbeiana, with partial tail. 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 seriously depleted native frog populations in many areas of the West.
    06190084.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211100.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
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211238.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on leaves of Douglas iris, Iris douglasiana
    07090038-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on iris flower
    07090045-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on sunflower, Helianthus sp.
    07090080-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on sunflower, Helianthus sp.
    07090140-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on sunflower, Helianthus sp.
    07090147-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on Douglas iris, Iris douglasiana
    07090168-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on Douglas iris, Iris douglasiana
    07090177-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on Douglas iris, Iris douglasiana
    07090191-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on California poppy, Eschscholzia californica
    07090275-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on California poppy, Eschscholzia californica
    07090294-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on stem of California poppy, Eschscholzia californica
    07090304-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on Calla lily, Zantedeschia aethiopica
    07090325-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla) on Calla lily, Zantedeschia aethiopica
    07090346-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on deer fern, Blechnum spicant
    07090386-treefrog.jpg
  • Pacific treefrog (Pacific chorus frog), Hyla regilla (Pseudacris regilla), on leaves of Douglas iris, Iris douglasiana
    07090428-treefrog.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
  • 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
  • Driveway of home in Oasis Valley, Nevada, habitat of Amargosa toad, Bufo nelsoni
    07100915-amargosa-toad-sign.jpg
  • Canyon treefrog, Hyla arenicolor, is well camouflaged in the rocky streambed of Bear Canyon, Coronado National Forest, Arizona
    08091317.jpg
  • Canyon treefrog, Hyla arenicolor, sits beside an intermittent stream in Bear Canyon, Coronado National Forest, Arizona
    08091323.jpg
  • Canyon treefrog, Hyla arenicolor. The frog's staccato mating call creates ripples in an intermittent stream in Bear Canyon, Coronado National Forest, Arizona.
    08091335.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.
    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.
    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.
    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.
    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.
    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
  • 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
  • Cane toad, Bufo marinus. Captured in a fountain in front of Punta Leona hotel and resort, near Jaco, Costa Rica
    09062175-cane-toad.jpg
  • Cane toad, Bufo marinus. Captured in a fountain in front of Punta Leona hotel and resort, near Jaco, Costa Rica
    09062176-cane-toad.jpg
  • Cane toad, Bufo marinus. Captured in a fountain in front of Punta Leona hotel and resort, near Jaco, Costa Rica
    09062177-cane-toad.jpg
  • Cane toad, Bufo marinus. Captured in a fountain in front of Punta Leona hotel and resort, near Jaco, Costa Rica
    09062179-cane-toad.jpg
  • Red-eyed treefrog, Agalychnis callidryas. Villa Lapas, near Herradura, Costa Rica
    09062291.jpg
  • Red-eyed treefrog, Agalychnis callidryas. Villa Lapas, near Herradura, Costa Rica
    09062298.jpg
  • Red-eyed treefrog, Agalychnis callidryas. Villa Lapas, near Herradura, Costa Rica
    09062305.jpg
  • Red-eyed treefrog, Agalychnis callidryas. Villa Lapas, near Herradura, Costa Rica
    09062327.jpg
  • Red-eyed treefrog, Agalychnis callidryas. Villa Lapas, near Herradura, Costa Rica
    09062337.jpg
  • Cane toad, Bufo marinus. El General Valley, Costa Rica
    09063138-cane-toad.jpg
  • Female rice paddy frog, Fejervarya sp., from the Baucau district of Timor-Leste (East Timor)
    10040067-rice-paddy-frog.jpg
  • Female rice paddy frog, Fejervarya sp., from the Baucau district of Timor-Leste (East Timor)
    10040083-rice-paddy-frog.jpg
  • Male rice paddy frog, Fejervarya sp., from the Baucau district of Timor-Leste (East Timor)
    10040143-rice-paddy-frog.jpg
  • Striped treefrog, Polypedates leucomystax, from the Baucau District of Timor-Leste (East Timor). This frog has only recently been studied in Timor-Leste, and will probably be assigned to another species.
    10040165-treefrog.jpg
  • Metamorphosing black-spined toad, Duttaphrynus melanostictus. Toadlet has four legs and is able to breathe air and walk on land, but has not fully resorbed its tail. Photographed on a US dime to show its size. Dili District, Timor-Leste (East Timor).
    10040654-toad.jpg
  • Metamorphosing black-spined toad, Duttaphrynus melanostictus. Toadlet has four legs and is able to breathe air and walk on land, but has not fully resorbed its tail. Photographed on a US dime to show its size. Dili District, Timor-Leste (East Timor).
    10040656-toad.jpg
  • Metamorphosing black-spined toad, Duttaphrynus melanostictus, on the photographer's index finger.  Toadlet has four legs and is able to breathe air and walk on land, but has not fully resorbed its tail.  Dili District, Timor-Leste (East Timor).
    10040660-toad.jpg
  • Black-spined toad, Duttaphrynus melanostictus. Often mis-identified as cane toad, Rhinella marina or Bufo marinus, a species common to Australia and New Guinea but undocumented in Timor-Leste.  Ermera District, Timor-Leste (East Timor)
    10040669-toad.jpg
  • Blue American bullfrog, Rana catesbeiana, a rare mutation of a normally green frog caused by a lack of yellow pigment in the frog's skin. Mendocino County, California.
    13090016.jpg
  • Blue American bullfrog, Rana catesbeiana, a rare mutation of a normally green frog caused by a lack of yellow pigment in the frog's skin. Mendocino County, California.
    13090019.jpg
  • Pastures rainfrog (Cutín de potrero), Pristimantis achatinus, on a bromeliad in Tandayapa Valley, Ecuador
    13111385.jpg
  • Blue-sided treefrog, Agalychnis annae, also known as the Golden-eyed Treefrog, Coffee Frog, or Monkey Frog, an endangered species. A small population has been established in the gardens of the Hotel Bougainvillea, Santo Domingo de Heredia, Costa Rica
    17050052.jpg
  • Eggs of Red-eyed Treefrog, Agalychnis callidryas, with developing tadpoles visible. Tortuguero National Park, Costa Rica
    17050154.jpg
  • Red-eyed Treefrog, Agalychnis callidryas, in amplexus (mating) at Tirimbina Biological Reserve, Costa Rica.
    17050352.jpg
  • Masked Treefrog, Smilisca phaeota, near Arenal Volcano National Park, La Fortuna, Costa Rica. Also called the New Granada Cross-banded Treefrog.
    17050409.jpg
  • American bullfrog, Rana catesbeiana. Bullfrogs are native to the eastern United States, but have become established throughout the west. Captive frog photographed in studio.
    a147-bullfrog.jpg
  • American bullfrog, Rana catesbeiana. Bullfrogs are native to the eastern United States, but have become established throughout the west. Captive frog photographed in studio.
    a153-bullfrog.jpg
  • American bullfrog, Rana catesbeiana. Bullfrogs are native to the eastern United States, but have become established throughout the west. Captive frog photographed in studio.
    a160-bullfrog.jpg
  • American bullfrog, Rana catesbeiana, in duckweed, Lemna sp. Bullfrogs are native to the eastern United States, but have become established throughout the west. Captive frog photographed in studio.
    a185-bullfrog.jpg
  • American bullfrog, Rana catesbeiana, in duckweed, Lemna sp. Bullfrogs are native to the eastern United States, but have become established throughout the west. Captive frog photographed in studio.
    a203-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 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