Nest and Eggs: The Mockingbird's nest is made of twigs, moss, and grass, and is lined with feathers. The nest is from 3 to 10 feet (1-3 m) high, located in trees and shrubs. Mockingbirds will ferociously protect their eggs and young; they will even swoop down and attack cats or people.[this info from: enchantedlearning]
Species with repetitive songs, such as the Carolina Wren are effectively copied, but species with long, complex songs, such as the Song Sparrow, cannot be effectively imitated by the Mockingbird. [this info from: Wikipedia-mockingbird]
The northern mockingbird can be found in most of the continental United States from southern Oregon through northern Utah to Newfoundland and south to Mexico.
Mating season is between March and August. During mating season male mocking birds may sing night and day! Mockingbirds build cup-shaped nests in forks of trees or bushes. Both the male and female build the nest using twigs, leaves and grass. Both the female and male will take care of the fledglings. The babies leave the nest in a little over 10 days. The female usually has two broods a year, but she can have up to four.
The mockingbirds has even been known to mimic the sounds of dogs and sirens! The mockingbird is especially vocal on moonlit spring nights.
The mockingbird is very territorial. It dives and attacks intruders that come too close to its territory. It may even attack its own reflection!
[this info from: natureworks]
Life History: The Northern Mockingbird is the most widely-known songbird in America. It is the state bird of Texas, but perhaps best known for its singing abilities. Not only can it perform 39 species' songs and 50 call notes, but it also can mimic sounds such as that of a barking dog, squeaky hinges, notes from a piano and even a cackling hen, so expertly that even an electronic analysis could not tell the difference between the mockingbird and the original. [this info from: holoweb.com
there are several species of mockingbirds in the world: the Northern Mockingbird(the most common species), the Darwin's mockingbird, tropical mockingbirds, Bahama Mockingbird, Socorro Mockingbird, Large-billed (St. Andrew) Mockingbird, Brown-backed Mockingbird, Chalk-browed Mockingbird, Patagonian Mockingbird,Chilean Mockingbird,and the Long-tailed Mockingbird being most of the species documented. There may be other species out there undocumented, or even species already gone extinct, but only time can tell.
the Floreana Mockingbird is one of the lesser-known species of mockingbird, and is deep on the endangered species list.
Sections of info from memory, but otherwise from these sites
Mockingbird ?'s and Answers