About 8,000 records are added per year. Abstracts added from September 1996 onward. SWIS provides more than 94,800 records drawn from over 400 journals in addition to books, reports of congresses, dissertations, and theses. A main database on wild birds and mammals is supplemented by special files on protected animals and wildlife interaction with traffic, disturbance, and agriculture. Ninety percent of the citations in this file of 19,940 records are drawn from unpublished research reports, field studies, and surveys from U.S. state agencies.
Document delivery is available.
Some of the source literature is unique to the region. The coverage of North American theses and dissertations is excellent. The World Conservation Union database provides about 3,400 records most of which are related to Conservation of Life on the Planet. The bibliographic records are bifurcated into two database viz. The list of serials provided in the IUCN - Serial holdings database provides complete details of various serials, which is an invaluable tool for researchers and scientists.