This online and free resource allows to quickly search for a species using either common name or scientific name. This is an excellent starting point when finding out information on a species.
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Merriam-Webster Online Dictionary and Thesaurus The Merriam-Webster Online Dictionary is based on the print version of Merriam-Webster's Collegiate® Dictionary, Eleventh Edition.
This is another online and free resource brought to us by Thomson Reuters who are responsible for Web of Science, BIOSIS Previews, and Zoological Record databases. This index provides information about species taxonomy and name variation.