Abstract
We studied the behavior of five Gray-hooded Flycatcher (Mionectes rufiventris) males on their display territories which were part of a dispersed lek located in a lowland Atlantic rain forest in southeast Brazil. The lek was active from the end of the short dry season in August to the following January. The number of territory-holding males fluctuated between four and nine. Calls were the main form of long-distance advertisement by males on display territories. These calls predominated in the morning, which corresponded to the period of greatest vocal and display activity by males. Aggressive wiib notes predominated in the afternoon. Call rate, which may affect mating success, varied among males. The lek behavior of the Gray-hooded Flycatcher showed similarities to and important differences from such behavior in the Ochre-bellied (M. oleagineus) and McConnell's Flycatchers (M. macconnelli).
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