The common name of a bird is the title which is used in everyday speech, writing, and websites like this one. "Black-Capped Chickadee" and "Blue Jay" are common names; see scientific names to learn about a second way to label birds.
The English common name of a species adopted for use by NatureServe.
An attribute. The common name contains the full name of the entry (such as "Susan B. Anthony"). Often used as the first part of a distinguished name. Often contains several values: with and without the middle name, with a nickname as the first name, etc.