This is a guide to help with data analysis of avian monitoring programs. It covers assessment of abundance and species composition using point counts, demographic monitoring via mist-nets and demographic monitoring via nest-monitoring. The guide...
Birds; Grasslands; Migratory birds; Perching birds; Research; Species of concern;
This is a description of the molt and aging criteria for four grassland passerines. The species covered are Sprague's Pipit, Grasshopper sparrow, Baird's sparrows, and Chestnut-collared Longspurs. Molt information is important for determining...
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...
This is the 1998 status assessment of the scaleshell mussel in the United States. It includes biological information on the species, distribution status information and detailed status figures.
Abstract: The Antillean manatee (Trichechus manatus manatus, hereafter manatee), inhabiting Puerto Rico’s coastal waters, is a subspecies of the endangered West Indian manatee (Federal Register, July 22, 1985. Vol. 50(140):29900-29909). Habitat...
This is a status assessment of the Eastern massassauga in North America. It includes biological information on the species, distribution status information and detailed status figures.
