This is a guide to altricial passerines. It has an explanation of variables used for aging birds and an explanation of methodology employed, and provides information obtained while recording the early aging of the Dusky Flycatcher, the Carolina...
This is a wildlife fact sheet describing the American alligator. It explains some biological information on the animal, and describes briefly its move from endangered status to full recovery.
Wildlife fact sheet about brown pelicans. The brown pelican, also called American brown pelican or common pelican, inhabits the Atlantic, Pacific, and Gulf Coasts of North and South America.
This fact sheet describes the bull trout. Differences between bull trout and other salmonids, particularly Dolly Varden are explained. It also briefly describes the fish's breeding and feeding habits, the water conditions it prefers, and the...
Endangered species; Birds; Birds of prey; Captive breeding; Reintroduction; Raptors;
1976, (41 FR 187). Long recognized as a vanishing species (Cooper 1890, Koford 1953, Wilbur 1978), the California condor remains one ofthe world’s rarest and most imperiled vertebrate species. Despite intensive conservation...
Work of the Service; Wildlife management; Birds; Waterfowl; Employees (USFWS); Personnel; Biologists (USFWS); Research
Biological Technician Scott Freeman candles a scoter egg to see at what stage of incubation the nest is during a white-winged scoter breeding ecology study on the Yukon Flats National Wildlife Refuge.
Birds; Migratory birds; Monitoring; Perching birds; Research; Statistics; Species of concern; Wildlife management;
This is a status assessment and conservation plan for the Cassin's Sparrow. It includes a description and natural history of the bird, as well as range information pertinent to breeding, migration and wintering, monitoring activities, population...
