Images

Image of a Male Sharp-tailed grouse during spring breeding season in North Dakota

Brewer's sparrow (Spizella breweri) and sagebush sparrow (Artemisiospiza nevadensis) breeding habitat in central Nevada.

A tundra shrew (Sorex tundrensis) from Far East Siberia.

Male Eastern tiger swallowtail butterfly resting on a leaf.

Male Eastern tiger swallowtail butterfly drinks nectar from a flower.

Male Eastern tiger swallowtail butterfly drinks nectar from a flower.

Unhatched eggs in Brewer's sparrow (Spizella breweri) nest.

Sagebrush in central Idaho.

Big sagebrush near Parawon, UT.

Atlantic salmon runs in the Penobscot and Kennebec Rivers of Maine are federally endangered and remain low. Inefficient fishways at dams continue to slow and prevent upstream migrations to spawning habitat, and delays of weeks to months are common. These delays expose fish to elevated water temperatures, resulting in increased metabolic demands.

Tropical rainforest vegetation including tree ferns, epitphytes, vines, bromeliads, and a waterfall in a mountainous rainforest garden.

Side view of giant panda. Mei Xiang is a female panda at the National Zoo in Washington D.C. She is being studied by scientists in efforts to save the endangered species.

Side view of giant panda. Mei Xiang is a female panda at the National Zoo in Washington D.C. She is being studied by scientists in efforts to save the endangered species.

A forested glade along the Fern Lake Trailhead in Rocky Mountain National Park.

Tree ferns and profuse tropical vegetation framing a mountainside waterfall, visible in the background, in a rainforest garden.

Tree ferns, ephiphytes, bromeliads, banana plants, and other rainforest vegetation framing a waterfall, visible in the background, in the tropical rainforest mountains.

Giant panda on grass. Mei Xiang is a female panda at the National Zoo in Washington D.C. She is being studied by scientists in efforts to save the endangered species.

Tree ferns and a waterfall visible in the background in a mountainous rainforest garden.

Bird Banding Station - Master bird bander, David Mitchell, collects a cloacal swab sample from a gray catbird during a capture-recapture study at a Monitoring Avian Productivity and Survivorship (MAPS) program bird banding station. The sample will be tested for avian influenza and other diseases.

Bird Banding - Elizabeth Sellers points out identification characteristics in the plumage of a male common yellowthroat to John P. Mosesso during a capture-recapture study at a Monitoring Avian Productivity and Survivorship (MAPS) program bird banding station.

Giant panda on rock. Mei Xiang is a female panda at the National Zoo in Washington D.C. She is being studied by scientists in efforts to save the endangered species.