Swallow-tailed Nightjar Uropsalis segmentata
Version: 1.0 — Published October 3, 2014
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There is very little information on the breeding biology of Swallow-tailed Nightjars. A nest with an egg is reported from Ecuador in September, a nest with a downy young is reported from Colombia in February, and a nests with a nestling is reported from Colombia in August (Hilty and Brown 1986, Harms et al. 2006). The nest from Ecuador is described in detail (Harms et al. 2006). This nest was dried leaves and dead twigs lining a small depression in the ground. The nest was located in a small, level clearing on a steep, northeastern-facing slope with small shrubs, ferns, and bamboo around. This nest had a single, unmarked white egg (3 by 2 cm). Only the female incubated the egg during the few days that the nest was observation.
Schönwetter (1964) described an egg from Bolivia as having "dense clay-brown scribbles on a pale-brown background with very fine light-grey spots". This perhaps suggests a dramatic difference in egg color between the two subspecies of Swallow-tailed Nightjar, although Schönwetter had some doubts that this egg was correctly attributed to Swallow-tailed Nightjar.