Size

• The male is 7 inches long, while the female is 6 1/2 inches long. The male's weight is 1 to 1.1 ounce, with the female being slightly heavier.
  
  

Color

• A male has a brilliant blue head, nape and back, with a warm reddish-brown-colored breast and white on the lower belly. Female markings are similar, but the color is somewhat muted. The female also has a white eye ring, states Bluebird Hollow, a website dedicated to information about the species.
  
  

Song

• Bluebirds have both loud and soft songs. The male bluebird sings loudly when looking for a mate, when nesting and also to warn of danger. Females have been observed singing loudly when the male is not close by and there is a predator. Males use the soft song as an assurance to the female during egg-laying time.
  
  

Call

• The bluebird call, "tu-a-wee," is made by males, females and juveniles as a contact signal between family members.
  
  

Parental Care

• The male does not assist the female with nest-building or incubating. After the chicks hatch, the female parent performs almost all of the feeding.