A black-tailed prairie dog perches in its burrow, surrounded by heavy equipment and machinery.  The rest of its colony were killed by bulldozers the week before.  Centennial, Colorado
A black-tailed prairie dog perches in its burrow, surrounded by heavy equipment and machinery. The rest of its colony were killed by bulldozers the week before. Centennial, Colorado
A baby prairie dog "kisses" his mom at a prairie dog colony in Arvada, Colorado.
A baby prairie dog "kisses" his mom at a prairie dog colony in Arvada, Colorado.
A female black-tailed prairie dog stands upright on watch on her burrow.  Lyons, Colorado
A female black-tailed prairie dog stands upright on watch on her burrow. Lyons, Colorado
A Parker Colorado resident dissents to a field being bulldozed with live prairie dogs on it to clear for development.
A Parker Colorado resident dissents to a field being bulldozed with live prairie dogs on it to clear for development.
American Bistort and Queen's Crown wildflowers show off under the dynamic late afternoon sun at Summit Lake, Colorado.
American Bistort and Queen's Crown wildflowers show off under the dynamic late afternoon sun at Summit Lake, Colorado.
A grad student working with the Denver Zoo pours mountain lion urine in the parking lot of Summit Lake, to deter ungulates.  Mount Evans, Colorado
A grad student working with the Denver Zoo pours mountain lion urine in the parking lot of Summit Lake, to deter ungulates. Mount Evans, Colorado
Juvenile Bighorn sheep gather in the morning light at a point overlooking Chicago Lake.  Summit Lake, Colorado
Juvenile Bighorn sheep gather in the morning light at a point overlooking Chicago Lake. Summit Lake, Colorado
Mountain goats traverses a ridge at sunset heading to Abyss Lake, where they will bed for the night.   Mt. BlueSky, Colorado
Mountain goats traverses a ridge at sunset heading to Abyss Lake, where they will bed for the night. Mt. BlueSky, Colorado
The road to Summit Lake, Mt. BlueSky Colorado
The road to Summit Lake, Mt. BlueSky Colorado
A backyard raccoon lurking about at nightin Cedar Park, Tecas.
A backyard raccoon lurking about at nightin Cedar Park, Tecas.
A male red-winged blackbird puts on a display defending his territory in early spring.
A male red-winged blackbird puts on a display defending his territory in early spring.
A group of black vultures congregate on the shore of the bay on the gulf coast in Texas.
A group of black vultures congregate on the shore of the bay on the gulf coast in Texas.
Biologist Julie Murray checks over a golden-cheeked warbler that she had just rescued from a net for a banding study. in Austin, Texas.
Biologist Julie Murray checks over a golden-cheeked warbler that she had just rescued from a net for a banding study. in Austin, Texas.
A northern mocking bird sits pretty in a Possumhaw tree in Austin, Texas.
A northern mocking bird sits pretty in a Possumhaw tree in Austin, Texas.
Female red-winged blackbirds gather in large flocks ion the plains in winter in southeastern Colorado.
Female red-winged blackbirds gather in large flocks ion the plains in winter in southeastern Colorado.
Two sally lightfoot crabs sit still on a rock among the crashing ocean waves in the Galapagos, Islands.
Two sally lightfoot crabs sit still on a rock among the crashing ocean waves in the Galapagos, Islands.
An unidentified red insect on a spring perennial in Cedar Park, Texas.
An unidentified red insect on a spring perennial in Cedar Park, Texas.
A Balcones Canyonlands Preserve volunteer works in the native plant garden in Austin, Texas.
A Balcones Canyonlands Preserve volunteer works in the native plant garden in Austin, Texas.
High key photo of fern spores in Maui, Hawaii.
High key photo of fern spores in Maui, Hawaii.
Field biologists Todd Bayless, Paul Fushille and Kenneth Sparks count endangered invertebrates in Big Tooth Cave. Austin, Texas
Field biologists Todd Bayless, Paul Fushille and Kenneth Sparks count endangered invertebrates in Big Tooth Cave. Austin, Texas
Standley lake on a cold night in December.  Arvada, Colorado.
Standley lake on a cold night in December. Arvada, Colorado.
The galaxy and its reflection in String Lake, Grand Tetons NP, Wyoming.
The galaxy and its reflection in String Lake, Grand Tetons NP, Wyoming.
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