Reproductive biology

Monogamy is prevalent, and some species are thought to be permanently territorial. The breeding and breeding seasons of many species are poorly known or undescribed. Most species nest solitarily but the white-winged triller (Lalage sueurii) of ten nests in loose colonies and the ground cuckoo-shrike also nests communally. Males of some of the larger cuckoo-shrike species have a courtship display in which the bird lifts each wing alternately, calling strongly while doing so.

The nest is a small, shallow cup of fine twigs, roots, bark, grasses, lichens, or moss, often bound together and sometimes lined with spider webs. It is usually placed on a fork or horizontal branch high in a tree and is difficult to see from below. In many species both sexes build the nest, but in the genera Campephaga and Pericrocotus nest-building is done chiefly by the female, assisted by the male.

The clutch is one to five eggs, usually two or three. In many species only the female incubates; in others both sexes share incubation duties. The incubation period varies from 14 to 25 days, and in many species is three weeks or more. The nestling period is of similar length (13-24 days). Both sexes care for the young. Most species for which information is available breed during or just after the rains.

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