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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] A spell of very low temperatures in winter can, however, result in higher mortality rates. [40]
The American robin rejects cowbird eggs, so brood parasitism by the brown-headed cowbird is rare, and the parasite's chick does not often survive to fledging. [41] In a study of 105 juvenile robins, 77.1% were infected with endoparasites, Syngamus sp. being the most commonly encountered, in 57.1% of the birds. [42]
Animal migration is the relatively long ... Temperature is a driving factor of migration that is dependent on the time of year. ... Aristotle proposed that robins ...
Robins can use up to 10% of their body weight to keep warm on a single winter night. But when temperatures drop and the ground freezes, finding food becomes very hard for the garden birds without ...
'robin' (erithacos) [1]) is a genus of passerine bird that contains a single extant species, the European robin (Erithacus rubecula). The Japanese robin and Ryukyu robin were also placed in this genus (as Erithacus akahige and E. komadori ), but were moved to the genus Larvivora in 2006.
The jacky winter (Microeca fascinans) is a small grey-brown robin found commonly throughout Australia and also in Papua New Guinea. The jacky winter acquired its name due to rapid and strong vocalisations, which sound like jacky-jacky winter-winter. [2] Their call is also often referred to as sounding like peter-peter-peter. [3]
Like all Australian robins, the eastern yellow robin tends to inhabit fairly dark, shaded locations, and is a perch and pounce hunter, typically from a tree trunk, wire, or low branch. Its diet includes a wide range of small creatures, mostly insects. Breeding takes place in the spring and, as with many Australian birds, is often communal.
It is a mainly resident breeder in eastern and southern Africa, though some adults and juveniles may migrate more than 100 km [15] to lower, warmer regions in winter. [3] In their winter refuges, they may coexist with several other species of robin. [7] Some are however year-round residents even at high altitudes. [7]