The neotropic ecozone covers a small tropical part of North America and complete South America. The birds there are called neotropical birds and the flavescent warbler ( Basileuterus flaveolus) is one of them. It inhabits forests and forest edges as well as woody savanna and desert vegetation and eats mainly beetles. In 2005, Charles Duca and Miguel Â. Marini published a paper about the territory size of the flavescent warbler in South Brazil. Previous studies suggest a correlation between territory size and habitat structure. The ‘ecological trap hypothesis’ predicts that on the one hand more insects are accessible for the birds at the forrest edge. On the other hand the nest predator rate is higher at the forest edges. However, the study of Duca and Marini does not support this hypothesis. Neither the insect biomass nor the nest predation vary significant between forest interior and forest edge. The territory size also does not depend on the distance to the forest border and vary little during the season. Nevertheless, the flavescent warbler seems to prefer living on the edge. “Males defending territories closer to the forest edge were more successful in pairing than those in the forest interior.” Territory size of the Flavescent Warbler, Basileuterus flaveolus (Passeriformes, Emberizidae),
in a forest fragment in Southeastern Brazil Charles Duca and Miguel Â. Marini Lundiana, Belo Horizonte 6.1 (2005): 29-33
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