Duca and Marini • BREEDING OF THE SHRIKE-LIKE TANAGER 
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FJG. l. Seasonal distribution of Shrike-like Tanager active nests and nests with eggs or nestlings at Estagao Ecoiogica 
de Aguas Emendadas, Brazil, from 2003 to 2006. Roman letters indicate 10-day periods of each month: I - from day 1 to 
'0; n = from day 11 to 20; III = from day 21 to 30 (or 31). 
Peak breeding activity of the Shrike-like Tanager 
alsQ coincided with that of the Red-rumped 
Cacique (Cacicus haemorrhous) in the Atlantic 
Forest (Duca and Marini 2004). 
Reproduction of Shrike-like Tanagers began at 
toe end of the dry season and beginning of the 
ftiny season (Alves and Cavalcanti 1990). This 
Pattern of nest initiation timing is similar to that of 
°toer passerines from southeast and central Brazil 
•Cavalcanti and Pimentel 1988, Marini 1992, 
Aguilar et al. 1999). Similarly, the beginning of 
the rainy season seems to be associated with 
reproduction in Song Wrens (Cyphorhinus phaeo- 
cephalus) in Panama (Robinson et al. 2000) and 
other tropical species (e.g., Aguilar el al. 2000, 
Mezquida 2002). 
The --30-day difference in timing of initiation 
of nests between 2003 and 2004 corresponds with 
difference in the onset of the rainy season between 
those years. The first rains started early in 2003 
