Sampling bags holding Brewer's sparrows (Spizella breweri), White Sands Missile Range, New Mexico.
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Bagged Brewer's Sparrows
Sampling bags holding Brewer's sparrows (Spizella breweri), White Sands Missile Range, New Mexico.
Brewer's Sparrow Being Assessed
John Warzybok assesses a Brewer's sparrow (Spizella breweri) at White Sands Missile Range, New Mexico.
John Warzybok assesses a Brewer's sparrow (Spizella breweri) at White Sands Missile Range, New Mexico.
Columbia Spotted Frog in the Blue Mountains of Oregon
Adult Columbia spotted frog photographed in Greenhorn pond in the Blue Mountains of Oregon
Adult Columbia spotted frog photographed in Greenhorn pond in the Blue Mountains of Oregon
Brewer's sparrow in hand
USGS' Steve Hanser holding a Brewer's sparrow (Spizella breweri).
USGS' Steve Hanser holding a Brewer's sparrow (Spizella breweri).
Sagebrush-dominated ecoregions
Sagebrush-dominated ecoregions in the western United States (sagebrush cover types shown in various shades of yellow, pink, and blue-grey).
Sagebrush-dominated ecoregions in the western United States (sagebrush cover types shown in various shades of yellow, pink, and blue-grey).
Eggs in Sparrow Nest
Clay-colored sparrow nest.
Clay-colored sparrow nest.
A Clay-Colored Sparrow Nest
A colorful clay-colored sparrow nest. These sparrows live in brushy grasslands and prairie habitats.
A colorful clay-colored sparrow nest. These sparrows live in brushy grasslands and prairie habitats.