Insect-eating Brazilian Free-Tailed bats (Tadarida brasiliensis) provide a great pest-control service to agriculture and natural ecosystems.
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Bats in a Texas Evening Sky
Insect-eating Brazilian Free-Tailed bats (Tadarida brasiliensis) provide a great pest-control service to agriculture and natural ecosystems.
Thousands of Horseshoe Crabs on Slaughter Beach, Delaware
The morning after a full moon high tide spawn, thousands of horseshoe crabs wait on the mud flats for the high tide to return.
The morning after a full moon high tide spawn, thousands of horseshoe crabs wait on the mud flats for the high tide to return.
Spawing Horshoe Crabs at Delaware Bay
Spawning horseshoe crabs at twilight in the Delaware Bay.
Spawning horseshoe crabs at twilight in the Delaware Bay.
Red Knots Forage for Horseshoe Crab Eggs at Delaware Bay
Red knots forage for horseshoe crab eggs and other invertebrates on the beaches of Delaware Bay. The bird on the left has a white leg flag marked with an "EX." It was initially capture in Canada in the fall of 2008.
Red knots forage for horseshoe crab eggs and other invertebrates on the beaches of Delaware Bay. The bird on the left has a white leg flag marked with an "EX." It was initially capture in Canada in the fall of 2008.
Red Knots Forage for Horseshoe Crab Eggs at Delaware Bay
Red knots forage for horseshoe crab eggs and other invertebrates on the beaches of Delaware Bay. The bird in the center has an orange leg flag indicating it was captured and flagged in the past in Argentina.
Red knots forage for horseshoe crab eggs and other invertebrates on the beaches of Delaware Bay. The bird in the center has an orange leg flag indicating it was captured and flagged in the past in Argentina.
Field collected Acipenseriformes
Acipenseriformes free embryo (pallid sturgeon, shovelnose sturgeon, or paddlefish) collected from the Missouri River.
Acipenseriformes free embryo (pallid sturgeon, shovelnose sturgeon, or paddlefish) collected from the Missouri River.
Avalanche debris on roadway
Road plows begin removing wet slab avalanche debris on Going to the Sun Road in Glacier National Park, 2009.
Road plows begin removing wet slab avalanche debris on Going to the Sun Road in Glacier National Park, 2009.
Avalanche path
Regular avalanche activity keeps this path clear of trees. Snowy peaks of Glacier National Park in the background.
Regular avalanche activity keeps this path clear of trees. Snowy peaks of Glacier National Park in the background.
Black-Crowned Night Heron
Hunting for minnows in a freshwater swamp, LA
Hunting for minnows in a freshwater swamp, LA
Avalanche debris and skier
Debris from Red Rock Avalanche covers the road and is piled high along the banks of the river as a skier make his way along the road, 04/06/2009
Debris from Red Rock Avalanche covers the road and is piled high along the banks of the river as a skier make his way along the road, 04/06/2009
Japanese Flowering Cherry (Prunus serrulata)
Japanese flowering cherry tree blooms near the Jefferson Memorial.
Japanese flowering cherry tree blooms near the Jefferson Memorial.
Autumnalis cherry blossom (Prunus subhirtella)
An Autumnalis cherry blossom tree is photographed during peak bloom with the Washington Monument and Tidal Basin in the background.
An Autumnalis cherry blossom tree is photographed during peak bloom with the Washington Monument and Tidal Basin in the background.
WERC A Silky Flycatcher with a Mistletoe Berry
A female silky flycatcher with a mistletoe berry in her beak. These flycatchers are intimately tied to mistletoe. They build their beautiful cup nests (much like a large hummingbird nest) within the mistletoe, or nearby. The young hatch during February when the mistletoe may be in flower and supply a rich source of insect nutrients for growing young.
A female silky flycatcher with a mistletoe berry in her beak. These flycatchers are intimately tied to mistletoe. They build their beautiful cup nests (much like a large hummingbird nest) within the mistletoe, or nearby. The young hatch during February when the mistletoe may be in flower and supply a rich source of insect nutrients for growing young.
Smoke Stack - Air Pollution
An example of human activities that impact the earth's atmosphere.
An example of human activities that impact the earth's atmosphere.
Rough skinned newt in defensive posture, EPA ponds, Corvallis, OR
Rough-skinned newt in defensive posture, EPA ponds, Corvallis, OR. Rough-skinned newts produce a powerful neurotoxin as a defense against predators.
Rough-skinned newt in defensive posture, EPA ponds, Corvallis, OR. Rough-skinned newts produce a powerful neurotoxin as a defense against predators.
A Golden Eagle Perches in a Tree
A golden eagle perches in a tree at the William L. Finley National Wildlife Refuge, Oregon.
A golden eagle perches in a tree at the William L. Finley National Wildlife Refuge, Oregon.
Southern Bald Eagle
Bald eagles nest in Louisiana, numbers are expanding rapidly
Bald eagles nest in Louisiana, numbers are expanding rapidly
Broad-Billed Hummingbird
Hummingbirds traditionally wintering in the tropics now routinely winter along the northern Gulf of Mexico coast
Hummingbirds traditionally wintering in the tropics now routinely winter along the northern Gulf of Mexico coast
Testing for Avian Influenza
A USGS scientist takes a sample from a northern pintail duck (Anas acuta) to be tested for avian influenza.
A USGS scientist takes a sample from a northern pintail duck (Anas acuta) to be tested for avian influenza.
Example mercury laboratory request for analysis form
Example completed filled in Wisconsin District Mercury Laboratory Request for Analysis form.
Example completed filled in Wisconsin District Mercury Laboratory Request for Analysis form.
Black-bellied Whistling Ducks
Wintering population at Lacassine NWR, LA
Wintering population at Lacassine NWR, LA