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Territorial disputes sometimes lead to fatalities, accounting for up to 10% of adult robin deaths in some areas. [38] Because of high mortality in the first year of life, a robin has an average life expectancy of 1.1 years; however, once past its first year, life expectancy increases. One robin has been recorded as reaching 19 years of age. [39]
The adult's main predator is the domestic cat; other predators include hawks and snakes. When feeding in flocks, it can be vigilant, watching other birds for reactions to predators. Brown-headed cowbirds (Molothrus ater) lay their eggs in robin nests (see brood parasite), but the robins usually reject the egg. [5]
The markings are denser at the larger end of the egg, where they form an irregular cap. Some eggs are blotched with dark reddish-brown at the large end. They are about 0.76–0.84 inches (1.9–2.1 cm) long and 0.55–0.62 inches (1.4–1.6 cm) wide. [28] Three to four eggs is the usual clutch. [36]
Deep cup nest of the great reed-warbler. A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian blackbird, or the elaborately woven hanging nest of the Montezuma oropendola or the village weaver—that is too ...
There are usually two or three eggs and the incubation is done solely by the hen bird and lasts fourteen to fifteen days. Both parents feed the chicks, which leave the nest after about a fortnight but remain dependent on the adults for another six or seven weeks. The white-throated robin-chat is sometimes parasitised by the red-chested cuckoo. [6]
The red-capped robin (Petroica goodenovii) is a small passerine bird native to Australia. Found in drier regions across much of the continent, it inhabits scrub and open woodland. Like many brightly coloured robins of the family Petroicidae, it is sexually dimorphic. Measuring 10.5–12.5 cm (4.1–4.9 in) in length, the robin has a small, thin ...
The adult dusky robin has brown feathers on the top of its head and on the sides of its neck. [2] The distinctive lore and narrow dark-brown line extending from behind the eye to the ear-coverts, forming a dark eye-stripe, bordered above by cream supercilious that extends from the base of the bill and peters out above the rear ear-coverts. [ 2 ]
The red-capped robin-chat is a relatively large species of robin-chat with a length of 15.5 to 19 cm (6.1 to 7.5 in). The adults have an orange-rufous head, face, breast and belly with a large dark eye. The overall appearance of the head is of anplain face with the dark eye in its centre.