4,010 Free Images of Threatening

endangered and/or threatened species biologists(usfws)wildlife refuge fish work of the service aquatic environment water animals wildlife fishery

Columbian white-tailed Deer on Tenasillahe Island

Measuring a hellbender

north carolina amphibian

Devils Hole Pupfish in captivity-1

Masked bobwhite quail

Documenting the Hellbender

north carolina amphibian

Hatchling Gopher tortoises sharing a burrow

reptiles georgia

Biologists search for Fountain Darter-3

Ash Meadows Amargosa pupfish-1

Red wolf-1

Pallid sturgeon-1

conservation fish

Puerto Rican Amazons days prior to release

Kendall Warm Springs dace-2

Biologist shows scales on the Gulf sturgeon in river

Juvenile Gopher tortise feeding

reptiles animals

Blue Whale carcass

Devils Hole Pupfish in captivity-1

Anglers release a salmon-3

recreational fish

Texas wild-rice

Santa Monica Mountains dudleya-4

Two year old pallid sturgeon

conservation fish

Sockeye salmon-1

Mountain yellow-legged frog-1

amphibian animals

Caribbean roseate terns-2

Rafinesque's big-eared bat-3

Biologists feed a protein and sugar mixture to each captured bird

Biologists show length of Gulf sturgeon in river-2

Preparing a small GPS satellite collar for the sedated lynx

mammals monitor

Red Knot banding-3

Biologist shows front view of Gulf sturgeon in river-2

Santa Monica Mountains dudleya

Biologists search for Fountain Darter-2

Display at National Conservation Training Center

Biologist shows front view of Gulf sturgeon in river-1

Biologists show length of Gulf sturgeon in river-1

Biologists tagging Delmarva Peninsula fox squirrels

education mammals

Biologists show length of Gulf sturgeon in river-1

Biologists show length of Gulf sturgeon in river-3

Biologists show length of Gulf sturgeon in river-2

Ash Meadows Speckled Dace-2

Biologists display spine of Gulf sturgeon in river

Researchers track the movement of endangered Gray bats-1

Biologists show length of Gulf sturgeon in river-4

Closeup of a collared lynx

wildlife animals

Juvenile pallid sturgeon yearling-2

conservation fish

Hatchling Gopher tortoise basking on rye grass

reptiles animals

Biologists search for Fountain Darter-1

Anglers on the Columbia River shoreline

Candy darter-6

Young couple fishing

Pallid Sturgeon-1

underwater fish

Captive Devils Hole pupfish-2

Wading fisherman

Kendall Warm Springs dace-1

Pair of endangered Koloa Maoli

Biologist stocks Gila trout into Mineral Creek-1

Biologist shows side view of Gulf sturgeon in river-3

Golden Paintbrush (CALE) found on Ebey's Bluff, located at the Robert Y. Pratt Preserve, Washington State

Dwarf Lake iris

Cryogenic tanks for Pallid sturgeon sperm-1

Researchers track the movement of endangered Gray bats-1

Eastern small-footed bat-2

Black-footed Ferret-2

wildlife animals

Biologist in boat study Gulf sturgeon in river-1

Black-footed Ferret kits

wildlife animals

Biologists in boat net Gulf sturgeon in river-1

Black wolf catches a Uinta ground squirrel

wildlife animals

Pallid sturgeon juvenile yearling

conservation fish

Juvenile yearling pallid sturgeon

conservation fish

Red wolf-1

wildlife animals

Volunteer holding a sub-adult humpback chub

Biologists search for Fountain Darter-1

Employee displays banded Hawai‘i creeper

Biologist shows front view of Gulf sturgeon in river

Devils Hole Pupfish in captivity-2

Ash Meadows Amargosa pupfish-1

Sockeye salmon-2

underwater fish

Condor habitat in mountainous Ventana Wilderness Area

Texas wild-rice-1

Researchers track the movement of endangered Gray bats

Captive Devils Hole pupfish-4

Anglers catch and release

Recreational fishing on the Columbia River

Biologist in boat study Gulf sturgeon in river-1

Biologists dip net Gila trout out of tank into buckets-5

partnership new mexico

Delmarva Peninsula fox squirrel pit tagging-1

maryland mammals

Biologist stocks Gila trout into Mineral Creek-4

Red wolf captive-5

animals mammals

Black-footed Ferrets in preconditioning pens

wildlife mammals

Juvenile pallid sturgeon -2

conservation fish

Capative propagation of the purple bankclimber mussel-1

American paddlefish fry 5 week old

Colorado hookless Cactus-1

Cryogenic tanks for Pallid sturgeon sperm-1

Hatchling Gopher tortoise feeding-2

reptiles animals

Cryogenic tanks for Pallid sturgeon sperm-2

Black-footed Ferret-2

wildlife mammals

Anglers on the Columbia River

Wolf collaring-1

Vahl's Boxwood

Florida manatee-2

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