Four Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
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Brewer's Sparrow Chicks
Four Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks and egg in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks and egg in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Four Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Four Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Sonoran Desert Tortoise
An Agassiz's desert tortoise in a wind energy facility near Palm Springs, California. USGS scientists have been studying the ecology of tortoises at this industrial site since the mid-1990s to learn more about the effects of utility-scale renewable energy development and operation on these threatened tortoises.
An Agassiz's desert tortoise in a wind energy facility near Palm Springs, California. USGS scientists have been studying the ecology of tortoises at this industrial site since the mid-1990s to learn more about the effects of utility-scale renewable energy development and operation on these threatened tortoises.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Depredated Brewer's sparrow (Spizella breweri) chick and nest, Steens Mountain, SE Oregon.
Depredated Brewer's sparrow (Spizella breweri) chick and nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Nest
Depredated Brewer's sparrow (Spizella breweri) chick and nest, Steens Mountain, SE Oregon.
Depredated Brewer's sparrow (Spizella breweri) chick and nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Depredated Brewer's sparrow (Spizella breweri) chick and nest, Steens Mountain, SE Oregon.
Depredated Brewer's sparrow (Spizella breweri) chick and nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's Sparrow Chicks
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Brewer's sparrow (Spizella breweri) chicks in nest, Steens Mountain, SE Oregon.
Dying pine infested with beetles
Mountain pine beetle-infested trees turn a striking red color throughout their crown as they're dying.
Mountain pine beetle-infested trees turn a striking red color throughout their crown as they're dying.
Mountain pine beetles/larvae tunneling in bark
Here, scientists point to a mountain pine beetle (top) and a pine beetle larva (bottom) that have been tunneling in the bark of a killed pine tree. The bluish streaks in the bark are from bluestain fungus.
Here, scientists point to a mountain pine beetle (top) and a pine beetle larva (bottom) that have been tunneling in the bark of a killed pine tree. The bluish streaks in the bark are from bluestain fungus.
Forest ecology fieldwork
USGS scientist Jenny Briggs (foreground) researches beetle-killed pines at a USGS study site near Maxwell Ranch, Colorado, while Colorado State University entomologist Dan West examines the bark of a dead tree.
USGS scientist Jenny Briggs (foreground) researches beetle-killed pines at a USGS study site near Maxwell Ranch, Colorado, while Colorado State University entomologist Dan West examines the bark of a dead tree.
Preserved mountain pine beetles next to a killed pine
Preserved mountain pine beetles next to a killed pinePreserved mature mountain pine beetles are held next to the trunk of a dead pine.
Preserved mountain pine beetles next to a killed pine
Preserved mountain pine beetles next to a killed pinePreserved mature mountain pine beetles are held next to the trunk of a dead pine.
Red needles signify dying pines
Reddish, dry needles are a sign of dying trees infested with mountain pine beetles.
Reddish, dry needles are a sign of dying trees infested with mountain pine beetles.
Beetle-killed and burned pine
Globs of resin on the outside bark of a pine tree indicate that it has been attacked by mountain pine beetles. The trees ooze this resin as a defense mechanism against the beetles. This pine tree has also been burned, probably in a forest fire.
Globs of resin on the outside bark of a pine tree indicate that it has been attacked by mountain pine beetles. The trees ooze this resin as a defense mechanism against the beetles. This pine tree has also been burned, probably in a forest fire.
A landscape of dead pines
USGS scientist Jenny Briggs walks through a study site near Blue Feather Lakes in Colorado. The reddish-brown trees dotting the landscape have been killed by mountain pine beetles.
USGS scientist Jenny Briggs walks through a study site near Blue Feather Lakes in Colorado. The reddish-brown trees dotting the landscape have been killed by mountain pine beetles.
USGS forest ecologist at work
USGS scientist Jenny Briggs measures the trunk of a pine tree that has been killed by mountain pine beetles.
USGS scientist Jenny Briggs measures the trunk of a pine tree that has been killed by mountain pine beetles.