northern mockingbird

Description:

found these two mockingbirds fighting over blueberries. The Northern Mockingbird, Mimus polyglottos, is the only mockingbird commonly found in North America. This species was first described by Linnaeus in his Systema naturae in 1758 as Turdus polyglottos. Northern Mockingbirds eat mainly insects in summer, but switch to eating mostly fruit in fall and winter. These birds forage on the ground or in vegetation; they also fly down from a perch to capture food. They mainly eat insects, berries and seeds. They have been seen drinking sap from the cuts on recently pruned trees. While foraging, they frequently spread their wings in a peculiar two-step motion to display the white patches. There lacks consensus among ornithologists over whether this behavior is purely a territorial display, or whether the flashing white patches startles insects into giving up their cover. Mockingbirds' willingness to nest near houses, their loud and frequent songs, and their territorial defense often annoy people. The Northern Mockingbird breeds in southeastern Canada, the United States, northern Mexico, the Bahamas, the Cayman Islands and the Greater Antilles. It is replaced further south by its closest living relative, the Tropical Mockingbird. The Socorro Mockingbird, an endangered species, is also closely related, contrary to previous opinion. The bird is the state bird of Arkansas, Florida, Mississippi, Tennessee and Texas. This bird is mainly a permanent resident, but northern birds may move south during harsh weather. This species has occurred in Europe as an extreme rarity. Northern Mockingbird males establish a nesting territory in early February. If a female enters his territory, the male will pursue the female with initial aggressive calls and, if she becomes uninterested, with softer calls. Once the pair is established, their song becomes more gentle. Northern Mockingbirds tend to be monogamous, and the female may return to the same male from the previous season. Both the male and female are involved in the nest building. The male does most of the work, while the female perches on the shrub or tree where the nest is being built to watch for predators. The nest is built approximately three to 10 feet above the ground. The outer part of the nest is composed of twigs, while the inner part is lined with grasses, dead leaves, moss or artificial fibers. The eggs are a light blue or greenish color and speckled with dots. Three to five eggs are laid by the female, and she incubates them for nearly two weeks. Once the eggs are hatched, both the male and female feed the chicks. The birds aggressively defend their nest and surrounding area against other birds and animals. Although many species of bird imitate other birds, the Northern Mockingbird is the best known in North America for doing so. It imitates not only birds but also other animals and mechanical sounds such as car alarms. As convincing as these imitations may be to humans, they often fail to fool other birds, such as the Florida Scrub-Jay. The Northern Mockingbird's mimicry is likely to serve as a tool for increasing the size of its repertoire and thus its ability to attract females.

Habitat:

these are found in my back yard. Mockingbirds have a strong preference for certain trees such as maple, sweetgum, and sycamore. They generally avoid pine trees after the other trees have grown their leaves. Also, they have a particular preference for high places, such as the topmost branches of trees. Mockingbirds are often found in urban and suburban areas, where they perch on telephone poles, streetlights, or high points on buildings. While singing on a high perch they will often bolt several feet into the air in a looping motion, with wings outstretched to display their white underside, then land back on the perch without breaking a note. This has been studied and thought to be a courtship display.

Notes:

Family:Mimidae Genus:Mimus