10 research outputs found
Frugivory and seed dispersal of Miconia theaezans (Bonpl.) Cogniaux (Melastomataceae) by birds in a transition palm swamp: gallery forest in Central Brazil
Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil
Isolation and characterization of polymorphic microsatellite loci in the scarlet ibis (Eudocimus ruber - Threskiornithidae-Aves)
Qualitative description of the submission and agonistic behavior of the Spix’s Macaw (Cyanopsitta spixii, Spix 1824), with special reference to the displacement displays
Coexistence between Nearctic-Neotropical migratory shorebirds and humans on urban beaches of the Southern Hemisphere: a current conservation challenge in developing countries
Reproduction of Blue-black Grassquits in central Brazil
During the reproductive season Blue-black grassquit (Volatinia jacarina) males are found in clusters, wherein they exhibit a distinctive display that consists of repeated, vertical leaps while simultaneously producing a brief vocalization. The main objective of this study was to describe details of the species' reproductive behavior in a "Cerrado" area of central Brazil and compare these data with some studies carried out in other areas. The data obtained concerning different aspects of nesting, laying and hatching were generally similar to those obtained in previous studies in other areas. However, we found that the typical clutch size of two eggs per nest is lower, and egg and nestling mortality rates higher in our area than what has been reported elsewhere. Our results suggest that males differ in time expended with different activities according to their reproductive condition and also provide extensive parental care. We found that display execution rates peak in the early morning and in the late afternoon and are higher in the middle of the breeding season. We also found that there is an inverse relation between the height of the display leap and the height of the perch