It also maintains links to image galleries from many zoos around the world. The images from this site are free for educational use. This site is maintained by the United States Department of Agriculture. It is full of all sorts of plant pictures. Mosses, liverworts, trees, shrubs, grasses, crop plants and many more.
Images are free.
Under water pictures. The Nanoworld Image Gallery Center for Microscopy and Microanalysis, The University of Queensland. Check out this site for lots of great SEM images. This is a great site for widllife photographs, especialy some polar bears from Churchill Manitoba. Requires you to register in order to join.