Duckdata: "A bibliographic database of published literature on the ecology, conservation, and management of North American waterfowl and their wetland habitats."
You don't want to wade through millions of Web pages. By using a few tricks, you can focus your searches relatively easily to those authoritative, reliable sources you want to use.
Use key search terms - Use the same search terms you used successfully to find books and articles.
Know your search tool - Use advanced search features to control your search. For example you can limit your search in Google to just search government or educational Web sites by limiting to a specific domain. Learn more at Google for Researchers.
Use search tools you can trust - Google Scholar indexes scholarly literature on the Web.