For most plants and animals, just listing the family, genus or species is enough to let biologists know what the other levels should be. The most common way to list the taxonomic name of an organism is to list the genus and species; this is known as binomial nomenclature, meaning a two-name system.
The grey jay is a relatively large songbird, though smaller than other jays. A typical adult grey jay is between 25 to 33 cm (9.8 to 13.0 in) long. Its wingspan is around 45 cm (18 in). It weighs about 65 to 70 g (2.3 to 2.5 oz). Adults have medium grey back feathers with a lighter grey underside.
These Blue jay facts about its diet, behavior and habitat are amazing and fun to read! slide 1 of 5. Meet the Blue Jay The blue jay is a large, songbird of 10 to 12 inches, with a wingspan of 13-17 inches. It is distinguished by its bright blue beautiful wing feathers, blue-gray body, and white or gray belly.