19.009 Foto gratuite per Usfws

acqua ricerca scientifica virginia occidentale pesce barca attrezzatura florida mammiferi ricreativo reptilia

Marine Mammal Stranding Course at NCTC-1

veicolo scienza

Close-up Monarch butterfly-2

farfalla animali

Researchers track the movement of endangered Gray bats-1

pipistrelli mammiferi

Marine Mammal Stranding Course at NCTC-1

Biologists feed a protein and sugar mixture to each captured bird

animali selvatici uccelli

Biologists search for Fountain Darter-1

Biologists show length of Gulf sturgeon in river-1

Biologists show length of Gulf sturgeon in river-1

Marine Mammal Stranding Course at NCTC-1

Marine Mammal Stranding Course at NCTC-1

Refuge biologist holds a Laughing gull chick

massachusetts uccelli

Biologist teaches children about the Monarch butterfly-2

gioventù insetti

Tagged Monarch and child-1

farfalla animali

Stocking fish from hatchery truck

Fish tank being lifted by helicopter

Female lynx looks around

mammiferi inverno

Biologist shows front view of Gulf sturgeon in river-3

attrezzatura barca

Tagged Monarch and child-1

farfalla animali

Biologist setting up a new live trap to capture and collar lynx

trasporto inverno

Rafinesque's big-eared bat-3

mammiferi roccia

Closeup of a collared lynx

animali selvatici animali

Biologists show length of Gulf sturgeon in river-3

Marine Mammal Stranding Course at NCTC-2

Biologists show length of Gulf sturgeon in river-2

Biologist conducts a swim test on a large Rainbow trout-1

Tagged Monarch and child-1

farfalla animali

Santa Monica Mountains dudleya

Fish Nutritionist checks quality control of fish food-1

Biologist teaches children about the Monarch butterfly-2

gioventù insetti

Tagged Monarch and child-2

farfalla animali

Wyoming toad-2

Biologists show length of Gulf sturgeon in river-2

Visual lures also help trap wild lynx

animali selvatici rapace

Biologist teaches children about the Monarch butterfly-3

gioventù insetti

Biologists show length of Gulf sturgeon in river-4

Biologists tagging Delmarva Peninsula fox squirrels

educazione mammiferi

Biologist stocks Gila trout into Mineral Creek-1

Aerial view of Selawik National Wildlife Refuge-1

cambiamento climatico alaska

Close-up of hatchery fish

sott'acqua pesce

Biologist shows front view of Gulf sturgeon in river-1

attrezzatura barca

Marine Mammal Stranding Course at NCTC-1

veicolo scienza

Marine Mammal Stranding Course at NCTC-1

Tagged Monarch and child-2

farfalla animali

Biologist working at Leadville National Fish Hatchery

FWS biologist observes captive Devils Hole pupfish-2

Biologist shows front view of Gulf sturgeon in river-1

Traveling to a trap along a frozen river

New shed

Tagged Monarch and child-1

farfalla animali

Biologist carrries a sedated Canada lynx

mammiferi inverno

Biologists display spine of Gulf sturgeon in river-2

Biologists secure boat along shoreline-2

Delmarva Peninsula fox squirrel-1

mammiferi animali

FWS biologist observes captive Devils Hole pupfish-2

Juvenile Gopher tortoise after digging burrow

Biologists in boat study Gulf sturgeon in river-1

USFWS Fisheries crew in boat preparing for lake sturgeon field work-7

FWS biologist observes captive Devils Hole pupfish-3

Snorkeler searches for hellbenders

Hatchling Gopher tortoises emerging from burrow to bask

reptilia animali

Biologists show length of Gulf sturgeon in river-6

attrezzatura barca

FWS biologist observes captive Devils Hole pupfish-3

USFWS Fisheries crew in boat preparing for lake sturgeon field work-1

Biologists show length of Gulf sturgeon in river-1

Snorkeling for Eastern hellbenders

FWS biologist observes captive Devils Hole pupfish-3

FWS biologist observes captive Devils Hole pupfish-1

Biologists weigh a Gulf sturgeon in river

Marine Mammal Stranding Course at NCTC-2

Pulling up to check a trap along the river

veicolo inverno

Marine Mammal Stranding Course at NCTC-5

Brown Noddy perched on a piece of wood

animali selvatici uccelli

Wolf collaring-2

mammiferi inverno

Biologist conducts a swim test on a large Rainbow trout-2

attrezzatura pesce

FWS biologist observes captive Devils Hole pupfish-2

Delmarva Peninsula fox squirrel pit tagging

mammiferi maryland

Biologists in boat study Gulf sturgeon in river-1

Biologists search for Fountain Darter-1

Biologist shows front view of Gulf sturgeon in river-2

Marine Mammal Stranding Course at NCTC-1

veicolo scienza

Aerial view of Selawik National Wildlife Refuge-2

paesaggio acqua

Measuring the canines of a sedated lynx

mammiferi monitor

Marine Mammal Stranding Course at NCTC-3

animali scienza

Red spruce restoration scenic

paesaggio albero

Visitor Services staff holds a Common tern chick-1

massachusetts uccelli

Aerial view of Selawik National Wildlife Refuge-4

paesaggio alaska

Rafinesque's big-eared bat

pipistrelli mammiferi

Gray wolf-2

animali inverno

Collared Canada lynx pauses for a moment

mammiferi inverno

Biologist teaches children about the Monarch butterfly-4

gioventù insetti

Snowshoe hare tracks

Working on a sedated lynx in the field

mammiferi inverno

Biologist working at Leadville National Fish Hatchery-1

Ohio River Islands biologist, Patricia Morrison, drives a boat on the river

Biologist working at Leadville National Fish Hatchery-1

Directorate Fellowship Program intern holds a Laughing gull chick

massachusetts uccelli

Marine Mammal Stranding Course at NCTC-2

veicolo scienza

Biologist shows front view of Gulf sturgeon in river-3

Fishery biologist surveys a American paddlefish

sott'acqua pesce

Biologists deploy a GPS elk collar on a cow elk

mammiferi mappe

701 - 800 di 19.009 Pagina successiva

/ 191