The Animal Welfare Institute, a nonprofit organization founded "to reduce the sum total of pain and fear inflicted on animals by humans," offers this frequently updated bibliographic database for information on all aspects of environmental enrichment for nonhuman primates. Search results include a list of relevant references with complete bibliographic information, brief summaries of each entry, Web links to full-text documents where available, and a keyword index for easily finding related sources. Users may also browse the entire contents of the database alphabetically. Primatologists and animal handlers alike should find this comprehensive database particularly useful.