Now showing items 301-304 of 304
A new subspecies of Black and Yellow Silky Flycatcher, Phainoptila melanoxantha^
in Costa Rica. In some middle and highlands the abrupt topography delayed the complete destruction of mon-
Comparación del peso de diferentes tipos de plumas entre cinco especies de aves del páramo de Chirripó, Costa Rica
Plumage weight was compared in highland and wide-range bird species (N= 18 weight samples): Sooty Robín (Tutdus nigresce/lS). Rufous-collared Sparrow (Zonotrichia cape/lSís), Volcano Junco (íunco vulcani), Slaty Flowerpiercer ...
First description of the nest and eggs of the Sooty-faced Finch
Sooty-faced Finches (Lysurus crassirostris) occur in dense undergrowth of wet forests that border streams along the Caribbean slope of Costa Rica between 600 to 1500 m in altitude. Its distribution is from Cordillera de ...
Mating and aggressive behaviour of Brachyrhaphis olomina (Cyprinodontiformes: Poeciliidae)
Despite the increasing interest in the use of intro-mittent male genitalia and coercive mating behaviour in poeciliids, detailed studies of the mating behaviour of most species in this family are lacking. We describe here ...