Birds of the World

Birds of the World (BoW) is an online database of ornithological data adapted from the Handbook of the Birds of the World and contemporary reference works, including Birds of North America, Neotropical Birds Online, and Bird Families of the World. The database is published and maintained by the Cornell Lab of Ornithology and collects data on bird observations through integration with eBird. The database requires a subscription to access the majority of its entries, but offers institutional access to many libraries and birding-related organizations, participating in the National Information Standards Organization's Shared E-Resource Understanding practice as a publisher.

The database is frequently cited in regional checklists and distribution map studies, either as a point of comparison or a source of data.