The names of some common birds are blue jay, mockingbird and hummingbird. The blue jay is known for its distinctive blue plumage and its loud calls; it is also a mimic of other birds. Blue jays are very common in the central and eastern parts of North America, and although their diet is usually made up of seeds, nuts and small invertebrates, they've also been known to rob nests.
Interestingly, the blue coloration of the bird's plumage isn't because of pigment but because of the way the light falls on its feathers. Blue jays are 10-to-12 inches long and weigh between 2.5-to-3.5 ounces.
The northern mockingbird is famous for the great variety of its song. It has even been heard to sing at night. This is especially true of bachelor males. Females also sing, though their song is quieter. The mockingbird is a mostly gray bird with a slender body. Its wings have white patches which it flashes at rivals to scare them off or at potential prey to startle them. The northern mockingbird is found year-round in much of North America and the Caribbean.
The hummingbird gets its name because of the insect-like hum made by its rapidly beating wings. Hummingbirds are the smallest birds, and their wings allow them to hover and even fly backwards. This is important because most hummingbirds drink nectar from flowers.