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- W2015366837 abstract "Summary Maclean, G. L. 1973. The Sociable Weaver, Part 3: Breeding biology and moult. Ostrich 44: 219–240. Rain or some associated phenomenon is the principal Zeitgeber releasing breeding in the Sociable Weaver. The species does not breed in the absence of rain. The same nest chambers are used for breeding as are used for roosting throughout the year. The Sociable Weaver is monogamous. The clutch size varies from two to six eggs, larger clutches being more common after good rains than in relatively poorer breeding periods. Food supply may therefore be the proximate factor regulating clutch size. Replacement clutches are not necessarily smaller than first clutches. The mean clutch size within a breeding period decreases with an apparent decrease in food supply. The parents share parental duties about equally. Up to four successive broods may be raised in a single breeding period; a breeding period may last up to nine months and may occur at any time of the year according to the somewhat erratic rainfall which averages about 226 mm per year in the study area. First broods help their parents to feed later broods; fourth brood chicks may therefore be fed by as many as 11 birds (nine young and two parents). This has survival value especially toward the end of a breeding period when food is scarce. Of similar value is the habit of starting incubation with the first or second egg of the clutch; in a relatively poor season older chicks will survive while younger ones will starve, thereby effectively and quickly reducing brood size. Young birds moult into adult plumage at four months, but do not normally leave the home colony. The sexes are indistinguishable at all ages, but there is an approximate ratio of eight males to five females in the study area. Wing moult is slow: each remex takes about a month for replacement. Body moult occurs within the space of a month, usually after rain while the birds are breeding. Primary remiges are moulted proximo-distally from 1 to 9; secondaries are moulted disto-proximally from 1 to 6. Body moult is antero-posterior with the dorsal surface slightly in advance of the ventral surface." @default.
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- W2015366837 date "1973-09-01" @default.
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- W2015366837 title "THE SOCIABLE WEAVER, PART 3: BREEDING BIOLOGY AND MOULT" @default.
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- W2015366837 doi "https://doi.org/10.1080/00306525.1973.9639160" @default.
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