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Jun 08 2011

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American Robin (Turdus migratorius)

American Robin

[order] PASSERIFORMES | [family] Turdidae | [latin] Turdus migratorius | [UK] American Robin | [FR] Grive migrateur | [DE] Wanderdrossel | [ES] | [NL] Roodborstlijster

Subspecies

Genus Species subspecies Breeding Range Breeding Range 2 Non Breeding Range
Turdus migratorius NA, MA Alaska and Canada to Guatemala
Turdus migratorius achrusterus
Turdus migratorius caurinus
Turdus migratorius confinis
Turdus migratorius migratorius
Turdus migratorius nigrideus
Turdus migratorius phillipsi
Turdus migratorius propinquus

Physical charateristics

American robins are birds that measure 25 cm in length and average 77 g in weight. Males are only slightly larger than females. They are brown on their backs, reddish on the breast, and white on their lower belly and under their tail feathers. Their throats are white, streaked with black. They have white crescents above and below their eyes. Females are slightly paler in color than males. Young American robins have dark spots on their breasts and are also paler in color than adult males.

Listen to the sound of American Robin

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Copyright remark: Most sounds derived from xeno-canto

wingspan min.: cm wingspan max.: cm
size min.: 24 cm size max.: 26 cm
incubation min.: 14 days incubation max.: 15 days
fledging min.: 14 days fledging max.: 15 days
broods: 2   eggs min.: 3  
      eggs max.: 5  

Range

North America, Middle America : Alaska and Canada to Guatemala

Habitat

American robins occur mainly in woodlands, gardens, orchards, lawns, and fields. They prefer areas of open ground or short grass for foraging, with woodland or a few scattered trees and shrubs nearby for nesting and roosting. Suburban and agricultural areas often provide these kinds of habitats so American robins are common near humans. They need dense shrubs and small trees in which to build their nests. They build nests deep in dense foliage to protect their young from predators

Reproduction

American robins breed in the spring shortly after returning to their summer range (north) from their winter range (south). The breeding season extends from April through July. American robins are one of the first birds to begin laying eggs and normally have two or three sets of young, or broods, in each breeding season. The cup-shaped nest is built by the female, who builds the outer foundation with long coarse grass, twigs, paper, and feathers woven together. She lines the inner bowl with mud, smearing it with her breast and later adding fine grass or other soft material to cushion the eggs. The nest can be located on the ground or high up in trees, but most commonly 1 to 5 meter above ground in a dense bush, in the crotch of trees, or on window ledges or other human structures. All that is needed for the nest is a firm support and protection from rain. A new nest is built to raise each brood. In northern areas the first clutch is generally placed in an evergreen tree or shrub, and the later clutches are laid in a deciduous tree. From 3 to 5 eggs are laid in each clutch.
Eggs are incubated by the female. After about 14 days of incubation the eggs hatch. She continues to feed and brood the chicks while they are very young. When the nestlings become older the female broods them only at night or during bad weather. Baby birds leave the nest about 2 weeks after they have hatched. All babies from a clutch leave the nest within 1 day of each other. Even after leaving the nest, the young birds follow their parents and beg food from them. They remain under cover on the ground during this time. About two weeks after fledging, young American robins become capable of sustained flight.

Feeding habits

American Robins feed on a mixture of both wild and cultivated fruits, berries, earthworms, and insects such as beetle grubs, caterpillars, and grasshoppers. Robins are flexible and will turn to whichever food is most readily accessible, although the diet generally consists of approximately 40% invertebrates, 60% fruits and berries.

Conservation

This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
American Robin status Least Concern

Migration

Winters from s Canada s to n C. America, s Florida, Cuba, Bahamas and Bermuda. Vagrant to British Isles

Distribution map

American Robin distribution range map

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