Wood bison are the largest native land mammals in the Western Hemisphere, 10 to 15% heavier than plains bison. Bulls are slightly larger than cows and average around 1,800 pounds, but can get up to 2,000 pounds. Both males and females have short...
Wildflowers; Prairies; Vegetation; Valleys; Species of concern;
The peacock larkspur is found only in the Willamette Valley of Oregon. Presently, the natural vegetation of the Willamette Valley is experiencing a threat not altogether different in magnitude from the Missoula Floods - human development. Since...
A K-Max Type 1 helicopter drops almost 1,000 gallons of water on the Lateral West Fire burning at Great Dismal Swamp National Wildlife Refuge, Suffolk, VA.
Phacelia submutica is a low-growing, herbaceous, spring annual plant with a tap root. The stems are typically 0.8 to 3 in (2 to 8 cm) long, often branched at the base and mostly lying flat on the ground as a low rosette (Howell 1944, pp....
Phacelia submutica is a low-growing, herbaceous, spring annual plant with a tap root. The stems are typically 0.8 to 3 in (2 to 8 cm) long, often branched at the base and mostly lying flat on the ground as a low rosette (Howell 1944, pp....
Phacelia submutica is a low-growing, herbaceous, spring annual plant with a tap root. The stems are typically 0.8 to 3 in (2 to 8 cm) long, often branched at the base and mostly lying flat on the ground as a low rosette (Howell 1944, pp....
Phacelia submutica is a low-growing, herbaceous, spring annual plant with a tap root. The stems are typically 0.8 to 3 in (2 to 8 cm) long, often branched at the base and mostly lying flat on the ground as a low rosette (Howell 1944, pp....
Pelican Island National Wildlife Refuge; Florida; Endangered species; Birds;
FWS personnel banding a Brown Pelican. Pelicans almost disappeared from Texas because they were poisoned by the pesticide DDT, which caused them to lay thin-shelled eggs which broke during incubation. Because they were not able to produce young,...
Cross country skier almost in silhouette standing on crest of snow bank with hazy snow-covered Brooks Range River Valley mountains in background and hazy sun in sky.
The Ozark cavefish is found in small cave streams with pool areas. The water source is almost always an upwelling from the groundwater table. Suitable caves are usually found in the vicinity of large permanent streams.
Arapaho National Wildlife Refuge sits in a glacial bowl at 8,300 feet elevation--the highest refuge outside of Alaska. Here birds migrate seasonally not north and south but up and down the mountains. Visitors are almost certain to see the...
Animals;Aves; Birds; Birds; Duck;Waterfowl; New Jersey
Both sexes of the American Black Duck have almost identical plumage. The body is a dark brown color, the crown is a lighter brown on the neck and head, with a dark stripe through the eye. In flight, the white wing linings can be seen in contrast...
Logan Cave National Wildlife Refuge; Arkansas; Endangered species; Fishes
The Ozark cavefish is found in small cave streams with pool areas. The water source is almost always an upwelling from the groundwater table. Suitable caves are usually found in the vicinity of large permanent streams. Over collecting and pollution...
Bird standing alertly almost knee deep in quiet water in Siskiyou County, California. Vertical. For more information about wading birds visit http://www.fws.gov/birds/.
