Birds

Avibase is a massive international database about birds, including regions, translations, and taxonomies. Managed by Denis Lepage and hosted by Bird Studies Canada, the Canadian copartner of Birdlife International. Available in many languages.

Birding trails throughout the US and Canada, from the American Birding Association.

A map of hawk watches through the US and Canada from the Hawk Migration Association of North America.

The Audubon Society's guide to species found in North America.

A database of bird species found at US national parks.

A Canadian birding organization with information on species.

A detailed and regularly updated list of all species found in North and Middle America, from the American Ornithological Society.

A detailed, thorough list of the birds of South America, from the American Ornithological Society.