How much do you really know about common birds you see regularly, such as House Finches (photo by Jim Merritt, Birds of the World).

Maybe it’s best to think about Birds of the World as All the birds of North America, or All the birds in your neighborhood throughout the year to appreciate how interesting and helpful this extensive online library of bird information is. It is the biggest and best library of information, photographs, and recordings of bird songs and calls – all easy to access in one place. Each species account is written by biologists who have studied the birds for years in the wild, and who provide information published by others in scientific journals, all in an easy to understand format with range maps and illustrations. You can sign up for a month or for a year, or opt out anytime.

Access the most comprehensive library about birds, species by species, family of birds by family. Did you know there are 363 species of hummingbirds? And that hummingbirds are only found in the Americas? Do you know where Ruby-throated Hummingbirds or Rufous Hummingbirds spend winter months? Birds of the World provides a remarkable information resource about every bird you see, or have ever seen, or ever wish to see, making it an enlightening source of information about birds.

Get more information about the 10 percent off introductory offer to get access to the best bird library that covers all species of birds – statewide, nationwide, and worldwide! – at Birds of the World - Cornell Lab of Ornithology