BNA Online provides comprehensive life histories for each of the 716+ species of birds breeding in the USA and Canada. The site, maintained by Cornell University, has image and video galleries showing plumages, behaviors, habitat, nests and eggs and sound recordings of bird calls.
A free archive of biomedical and life sciences journal literature at the
U.S. National Institutes of Health's National Library of Medicine. PMC serves as a digital counterpart to the National Library of Medicine's extensive print journal collection. (Journals currently available in the archive)
This version of Medline is integrated into the citation linking feature found in the Web of Knowledge database. It is far more sophisticated than the other Medline version offered by the library, and is recommended for advanced researchers.
Web of Science is the world's largest, high-quality interdisciplinary database back to 1965. All subject areas are covered, but the sciences are covered very well. WoS is easy to use, but it has many advanced features that make it an excellent tool for advanced researchers. See the Web of Science page for searching instructions.
You can search all these databases, or select only one.
Web of Science (Arts & Humanities Index, Science Citation Index, Social Sciences Index)
BIOSIS (the leading biological sciences database)
Current Contents (current awareness database covering more than 7,000 journals)
BioOne is a database of 200 high quality, subscribed and open-access titles focused in the biological, ecological, and environmental sciences. As a nonprofit organization, BioOne exists for the benefit of the scientific community.
NCBI (National Center for Biotechnology Information) is a cross-database search engine for approximately 24 life science databases. Some of the subjects covered include: gene sequences, molecular structure, proteins, and nucleotides.
The Aquatic Plant Information Retrieval System (APIRS) database contains citation and keyword records for scientific articles and reports about uncounted species of aquatic, wetland and invasive plants.