Wisconsin slide collection provides a huge range of identification photographs. Mr. Newt's ZooQuarium is a 'virtual private zoo' of selected species and their ecological niche. The CountryLovers' Pages provides a wide range of Nature based links. Natural History Museum provides interesting background on the museum, but don't expect it to replace a visit. Movie reviews and Information is a vast cross indexed catalogue of movies from the earliest days to next year.
Visitors can vote and add information.
Alta Vista is the best search engine for archive material, but is slow to pick up new stuff. To find obscure item use the advanced search with multiple keyword joined with 'near' - a feature most other search engines don't have.