Dan Suzio Photography

  • Home
  • Photo Catalog
    • All Galleries
    • Search
    • Cart
    • Lightbox
    • Client Area
  • About
  • Contact
  • Facebook
  • Twitter
x

Search Results

Refine Search
Match all words
Match any word
Prints
Personal Use
Royalty-Free
Rights-Managed
(leave unchecked to
search all images)
Next
172 images found
twitterlinkedinfacebook

Loading ()...

  • Tadpole of American bullfrog, Rana catesbeiana.  A week after hatching, the tadpole is about 8mm long and has developed the familiar head-and-tail shape. The skin is semi-transparent, and internal organs are visible.
    05150193-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  Ten days after hatching, the tadpole is about 8mm long. The skin is semi-transparent.
    05150200-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  A week after hatching, the tadpole is about 8mm long and has developed the familiar head-and-tail shape.  The skin is semi-transparent.
    05150173-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  A week after hatching, the tadpole is about 8mm long and has developed the familiar head-and-tail shape.  The skin is semi-transparent.
    05150148-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  A week after hatching, the tadpole is about 8mm long and has developed the familiar head-and-tail shape.  The skin is semi-transparent.
    05150143-bullfrog-tadpole.jpg
  • Egg of American bullfrog, Rana catesbeiana
    05150129-bullfrog-egg.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
  • 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.
    05150098-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.  Ten days after hatching, the tadpole is about 8mm long. The skin is semi-transparent.
    05150211-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.
    05150031-bullfrog-tadpole.jpg
  • Tadpole of American bullfrog, Rana catesbeiana.  A week after hatching, the tadpole is about 8mm long and has developed the familiar head-and-tail shape.  The skin is semi-transparent.
    05150195-bullfrog-tadpole.jpg
  • This Great Basin whiptail, Cnemidophorus tigris tigris, was killed and partially swallowed by a juvenile California king snake, Lampropeltis getula californiae. The lizard was too big to swallow and the snake eventually abandoned it. Desert Tortoise Natural Area, Mojave Desert, California.
    11040826.jpg
  • Western fence lizard, Sceloporus occidentalis, with western black-legged tick, Ixodes pacificus, carrier of Lyme disease in California.  Researchers at UC Berkeley have found that fence lizards' blood contains a substance that kills the Lyme disease bacterium, Borrelia burgdorferi, when a lizard is bitten by a tick.  This may explain the relatively low incidence of Lyme disease in California.
    r1049-fence-lizard.jpg
  • Western fence lizard, Sceloporus occidentalis, with western black-legged tick, Ixodes pacificus, carrier of Lyme disease in California.  Researchers at UC Berkeley have found that fence lizards' blood contains a substance that kills the Lyme disease bacterium, Borrelia burgdorferi, when a lizard is bitten by a tick.  This may explain the relatively low incidence of Lyme disease in California.
    r1047-fence-lizard.jpg
  • British herpetologist Mark O'Shea and American students Caitlin Sanchez, Jester Ceballos, Scott Heacox, Marianna Tucci, and Eric Leatham search for lizards near the Meleotigi River, in the Ermera District of Timor-Leste (East Timor). The group is part of an ongoing survey of Timorese reptiles and amphibians.
    10041626-east-timor.jpg
  • British herpetologist Mark O'Shea and American students Caitlin Sanchez, Jester Ceballos, Scott Heacox, Marianna Tucci, and Eric Leatham search for lizards near the Meleotigi River, in the Ermera District of Timor-Leste (East Timor). The group is part of an ongoing survey of Timorese reptiles and amphibians.
    10041625-east-timor.jpg
  • Western fence lizard, Sceloporus occidentalis, with western black-legged tick, Ixodes pacificus, carrier of Lyme disease in California.  Researchers at UC Berkeley have found that fence lizards' blood contains a substance that kills the Lyme disease bacterium, Borrelia burgdorferi, when a lizard is bitten by a tick.  This may explain the relatively low incidence of Lyme disease in California.
    r1046-fence-lizard.jpg
  • Western fence lizard, Sceloporus occidentalis, with western black-legged tick, Ixodes pacificus, carrier of Lyme disease in California.  Researchers at UC Berkeley have found that fence lizards' blood contains a substance that kills the Lyme disease bacterium, Borrelia burgdorferi, when a lizard is bitten by a tick.  This may explain the relatively low incidence of Lyme disease in California.
    r1044-fence-lizard.jpg
  • Western fence lizard, Sceloporus occidentalis, with western black-legged tick, Ixodes pacificus, carrier of Lyme disease in California.  Researchers at UC Berkeley have found that fence lizards' blood contains a substance that kills the Lyme disease bacterium, Borrelia burgdorferi, when a lizard is bitten by a tick.  This may explain the relatively low incidence of Lyme disease in California.
    r1042-fence-lizard.jpg
  • This Great Basin whiptail, Cnemidophorus tigris tigris, was killed and partially swallowed by a juvenile California king snake, Lampropeltis getula californiae. The lizard was too big to swallow and the snake eventually abandoned it. Desert Tortoise Natural Area, Mojave Desert, California.
    11040828.jpg
  • This Great Basin whiptail, Cnemidophorus tigris tigris, was killed and partially swallowed by a juvenile California king snake, Lampropeltis getula californiae. The lizard was too big to swallow and the snake eventually abandoned it. Desert Tortoise Natural Area, Mojave Desert, California.
    11040827.jpg
  • Western fence lizard, Sceloporus occidentalis, with western black-legged tick, Ixodes pacificus, carrier of Lyme disease in California.  Researchers at UC Berkeley have found that fence lizards' blood contains a substance that kills the Lyme disease bacterium, Borrelia burgdorferi, when a lizard is bitten by a tick.  This may explain the relatively low incidence of Lyme disease in California.
    r1052-fence-lizard.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.
    06190076.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
  • 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 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 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 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
  • 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.
    06190066.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.
    06190047.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.
    06190023.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.
    06190020.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.
    06190019.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.
    06190012.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.
    06190010.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
  • 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
  • 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.
    06180045.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.
    06180041.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.
    06180037.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 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.
    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.
    06100064-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 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.
    06100043-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 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.
    06100023-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.
    06070017-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.
    06050223-african-clawed-frog.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.
    06010164-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.
    06010108-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.
    06010097-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.
    06140308-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.
    06140307-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.
    06140303-bullfrog-tadpole.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211238.jpg
  • California toad (Western toad), Bufo boreas halophilus.  Eel River, Mendocino County, California
    06211121.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.
    06190092.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
  • 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.
    06190079.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.
    06190077.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.
    06190072.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.
    06190053.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.
    06190040.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.
    06190034.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.
    06180192.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.
    06180168.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.
    06180141.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.
    06180137.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.
    06180107.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.
    06180095.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.
    06180049.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.
    06100141-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.
    06100082-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 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.
    06100019-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.
    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.
    06070011-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.
    06050252-african-clawed-frog.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.
    06010158-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.
    06010143-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.
    06010096-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.
    06010086-bullfrog-tadpole.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
    06211100.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.
    06190091.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.
    06190068.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.
    06190060.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
  • 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.
    06180156.jpg
Next