NESTING RECORDS OF FIVE ANTBIRD SPECIES FROM THECOLOMBIAN AMAZON

Few nests of Amazonian antbirds (Thamnophilidae and Formicariidae) have been described.Here we present nesting records for five species of antbirds found in Tinigua National Park, Colombia. A pouchshapedpensile nest of the Warbling Antbird (Hypocnemis cantator) in a treefall gap within seasonally floodedforest contained two eggs colored like those found in French Guiana but different from those in AmazonianBrazil and Peru. The Black-spotted Bare-eye (Phlegopsis nigromaculata) also nested in seasonally flooded forest;it constructed a cup-shaped nest inside a hollow rotten stump and laid two eggs. Two naked nestlings with brightyellow bills disappeared soon after hatching. Two cup-shaped nests of the Scale-backed Antbird (Hylophylaxpoecilinota) were in mature terra firme forest. Both contained two eggs similar in color to those of othersubspecies; nestlings were naked and had conspicuous yellow bills. Those found in one nest disappeared 11days after hatching. A nest of the Amazonian Streaked-Antwren (Myrmotherula multostriata) containing oneegg was in seasonally flooded forest close to the river bank. This egg differed in coloration from others foundin Brazil and from those of other members of the M. surinamensis complex, with which it was formerlyconsidered conspecific. A Striated Antthrush (Chamaeza nobilis) nested in an unlined natural cavity some 3 mabove the ground. The nestling closely resembled the adult but was smaller, had yellow bill commissures, anda shorter tail

CARLOS DANIEL CADENA et al., Wilson Bull., 112(3), 2000, pp. 313-317