Birds of the World is a research database that brings together scholarly content from four major works of ornithology [Birds of North America, The Handbook of Birds of the World, Neotropical Birds, and Bird Families of the World], millions of bird observations from eBird, and multimedia content from the Macaulay Library into a single platform where biologists and birders can explore comprehensive life history information on birds. Birds of the World presents a vast array of information about every species, subspecies, and family of the world's birds.