Breeding

There is little information on the reproductive biology of Black-cheeked Warbler, other than the observations reported by Skutch (1967). Breeding in Costa Rica is from April-June (Stiles and Skutch 1989). This species builds an oven shaped nest of bamboo leaves and blades, ferns, roots, and vegetable fibers in a mossy bank or on the ground. The nest is ca 11.5-14 cm wide and 18 cm deep. The nest apparenlty is constructed by a single individual, presumed to be the female, although the presumed male may accompany the female. The nest is on the ground, on the side of a ravine or bank. The eggs are glossy white, flecked and speckled with cinnamon rufous, these markings concentrated around the larger end of the egg. There is no information on the length of incubation or the nestling period. At one nest, after the eggs had hatched, the brooding adult (presumed female) performed an injury-feigning display when the nest was approached too closely.