Whether you're an amateur ornithologist or a backyard bird-watcher, Worthington Libraries gives you unlimited access to the ultimate online guide to your feathered friends.

From Abert's towhee to the zone-tailed hawk, "Birds of North America" offers detailed scientific information for more than 750 bird species that breed in the U.S. and Canada.

Articles about each bird include information on appearance, behavior, migration, diet, demography, conservation and priorities for future research. They are accompanied by professional photographs showing plumage, habitat, nests, eggs and chicks.

"Birds of North America" also contains compelling audio and video clips. Listen to audio recordings of bird songs and calls, such as the song and call of a gray catbird (decide for yourself if it sounds like the mewing of a cat, which is how the bird got its name), watch an American goldfinch eating a sunflower seed up close or see a northern cardinal taking a dip in a shallow stream.

Maintained by the Cornell Lab of Ornithology, species accounts are written by ornithologists and other experts and continually updated. A one-year individual subscription to "Birds of North America" costs $42, but you can access this informative resource for free with your Worthington Libraries card.

Start at the library's website, worthingtonlibraries.org, and click on the Explore tab at the top of the homepage. Then select "Databases A-Z" and click on "B" (for "Birds of North America").

In addition to this comprehensive online resource, the library also has a number of books that everyone from beginning to longtime birders will find useful. There's "Natural Gardening for Birds," "Midwestern Birds: Backyard Guide," "Sibley's Birding Basics," "Better Birding" and the "Kaufman Field Guide to Advanced Birding."

Hillary Kline is a communications specialist for Worthington Libraries.