American Robins are 9 to 11 inches and are gray above, brick red below. Head and tail black in males, dull gray in females. Young birds are spotted below. Their song is a series of rich caroling notes, rising and falling in pitch. They use mud to reinforce their grass and twig, cup shaped, nests where they lay 3-5 blue-green eggs.
Robins are a common site in yards all across North America. They tend to eat earthworms in the morning hours and berries in the afternoons. In winter they, may not leave but, spend most of their time in the trees. They can produce three broods in one year.
They eat a lot of fruit in the fall and winter, sometimes becoming intoxicated on a diet of honeysuckle berries. They have been known to live for up to 13 years. Their scientific name is Turdus migratorius, belong to the order of Passeriformes and the family Turdidae.
They are the most abundant bird in North America at around 370,000,000 individuals. They are usually the earliest birds to sing at dawn. This species was first described in 1766 by Carl Linnaeus in the twelfth edition of his Systema Naturae as Turdus migratorius.
The eggs are preyed on by snakes, racoons and squirrels, while the adults have to watch for snakes, cats, eagles, owls and hawks. They are well known for appearing in the spring. An example is a poem by Emily Dickinson titled “I Dreaded That First Robin So”
Their female built nests are usually 5 – 25 feet above ground. The male and female protect the nest. The adult wing span is 12 to 16 inches. The females colors tend to be a bit duller than the males.
Flocks of robins vary in size from a few dozen, to a few hundred, to an estimated 720,000 roosting on an island of mangrove trees in Florida (which at 2.7 ounces each would be 61 tons). They tend to roost communally in trees or an old barn, or under a bridge.