Fabulous taxonomy / English-Latin name translator site for the Animal, Plant, Fungal, and 2 more kingdoms from the US Dept of Agriculture. ITIS, the Integrated Taxonomic Information System, lets you search by common name or scientific name of just about anything living.
Try a search for barnacle goose -- you'll see the taxonomic rank of the goose, its French name (bernache nonnette), its Taxonomic Hierarchy, and a few references. At the bottom of the page, you'll see an option to do a search for "Other Off-Site Resources", which includes BioOne and Google Images. A mini-, free, and workable federated search!
The off-site resource option searches the scientific name (Branta leucopsis), and at Google Images, you'll see just how cute the barnacle goose actually is.