Useful listings of links to other sites that provide detailed information on endangered species, with an emphasis on the United States, including species habitat, mating habits and dietary patterns...

"A guide to quality forestry and natural resources information on the Internet with over 1500 links" on urban, tropical, temperate and agroforestry...

"A broad, collaborative program to provide increased access to data and information on the nation's biological resources; the NBII links diverse, high-quality biological databases, information products, and analytical tools maintained by NBII partners and other contributors in government agencies, academic institutions, non-government organizations, and private industry...

This site, from Ohio University's Department of Environmental and Plant Biology, includes links to sites that are of local as well as broader interest...

A gateway site to "Web resources that offer preprint searches" from the Iowa State University library...

Well-done site with numerous links to other websites that deal with soil...