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In Africa, birds inhabiting forested regions are less seasonal in their activities than those from open areas. In order to study annual cycles in forest regions of South western Nigeria, West African Thrushes (Turdus pelios) were mist-netted and banded during the last two weeks of each month. The nest is a cup-shaped structure built out of grasses, herbs, weeds, roots and earth laid out in a clockwise manner. Only the nesting tree and feed- ing sites were defended during the breeding period. The clutch size was 2.69 ± 0.20 eggs with a mean incubation period of 14.11 ± 0.26 days. The mean nestling period was 15 ± 1.00 days. The nestlings were fed on a variety of plant and animal matter, of which grass seeds and insects were predominant. Moult was found to be protracted with a population moult period of 194 days and a much shorter individual moult period. Moult and breeding periods were spread out: moult period dovetailed into the breeding period. The birds were found to gain weight during the period but they attained their maximum weight in August after the moult period. The lowest weight was recorded in February, during the peak of the dry season, when food availability was lower. Rev. Biol. Trop. 53(1-2): 239-247. Epub 2005 Jun 24.

A twelve-month field study of the West African thrush Turdus pelios (Passeriformes: Muscicapidae). Part 2: annual cycles.