Photograph of Yellow-headed Blackbird - (c) Paul Marto

You are here

Reference Resources

Birds of North America


Species accounts on North American birds, with information about their characteristics, distribution, systematics, behavior, ecology, demography, and conservation. Co-produced by AOSCornell Lab of Ornithology, and The Academy of Natural Sciences. Free for AOS members (read more »).

Neotropical Birds


Species accounts on Neotropical birds, with information about identification, distribution (including interactive maps), systematics, life history, conservation, and priorities for future research. Produced by the Cornell Lab of Ornithology. Available free of charge.

Searchable Ornithological Research Archive


A collaboration between AOS, the Association of Field Ornithologists, the Wilson Ornithological Society, and the University of New Mexico Libraries. Provides access to ornithological literature in North America since 1884, including both The Auk (1884- ) and The Condor (1899- ).

Biodiversity Heritage Library


A consortium of natural history and botanical libraries digitizing the legacy literature held in their collections. Provides access to some ornithological titles not found in other bird-specific archives, including museum publications and field notes. Available free of charge. 

Welcome to the American Ornithological Society (AOS)
Advancing Scientific Knowledge and Conservation of Birds

© 2019 American Ornithological Society