Learn about the diversity of life that can be found in your backyard, country and around the world.
The Wildlife Library also helps you learn how to identify each of the species, so that you can submit sightings to Wildlife Watch.
You can also learn about the different natural and human-caused threats that are endangering many species of wildlife.
American alligator | Alligator snapping turtle | Arboreal salamander | Black rat snake | Bull shark | California red-legged frog | Cheat Mountain salamander | Chinook salmon | Eastern box turtle | Eastern fence lizard | Flying Fish | Hellbender | Louisiana pine snake | Mangrove rivulus | Mudminnows | Puerto Rican boa | Puerto Rican coqui | Pupfish | Rainbow trout or steelhead | Rattlesnakes | Sawfish | Sea turtles | Southern cricket frog | Spotted salamander | Texas blind salamander | Tiger salamander | Toads | Tree frogs | Wood frog
American dipper | American robin | Arctic tern | Bald eagle | Baltimore oriole | Black-capped chickadee | Brown-headed nuthatch | Brown pelican | Burrowing owl | Cedar waxwing | Eastern towhee | Great horned owl | Greater roadrunner | Mallard | Northern mockingbird | Northern spotted owl | Peregrine falcon | Red-bellied woodpecker | Red-cockaded woodpecker | Ruby-throated hummingbird | Sandhill crane | Western scrub-jay | Whooping crane | Wood duck
Ants | Bombadier beetles | Cecropia moth | Common Eastern bumble bee | Common house spider | Earthworms | Fireflies | Garden spider | Giant darner dragonfly | Horseshoe crab | Kāhuli tree snails | Millipedes | Monarch butterfly | Periodical cicadas | Rhinoceros beetles | Sea cucumbers | Tan jumping spider | Tarantulas | Termites | Vernal pool fairy shrimp | Walking sticks | Water strider | Yucca moths
American beaver | American pika | Bats | Bighorn sheep | Bison | Black bear | Black-tailed prairie dog | Blue whale | Canada lynx | Dusky-footed woodrat | Florida panther | Gray wolf | Grizzly bear | Hawaiian monk seal | Humpback whale | Key deer | Moles | Moose | Nine-banded armadillo | Orca | Pocket gophers | Polar bear | Pronghorn | Raccoon | Red fox | Red squirrel | Red tree vole | Snowshoe hare | Sperm whale | Spinner dolphin | Wolverine
Bald Cypress | Cacti | California Bay Laurel | Douglas Fir | Great Basin Bristlecone Pine | Joshua Tree | Longleaf Pine | Quaking Aspen | Red Mangrove | Red Maple | Resurrection Fern | Shagbark Hickory | Skunk Cabbage | Southern Live Oak | Truffles | Venus Flytrap