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. Accounts include images, sounds, and videos as well as illustrations, maps, animations, and authoritative text from all of the component projects.

The Web of Science accesses a multidisciplinary database of bibliographic information gathered from thousands of scholarly journals. The databases are indexed so you can search for specific articles by subject, author, journal, and/or author address. Because the information stored about each article includes the article's cited reference list (often called its bibliography), you can also search the databases for articles that cite a known author or work.
Emerging Sources Citation Index 2005-present
Science Citation Index 1965-present
Social Science Citation Index 1965-present