396 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Juvenile, similar to adult but without yellow crown spot ; dark 

 central stripe on rectrices usually narrower. 



As a species, these birds have an extensive distribution in the 

 Tropical Zone from northern Mexico through Central America, con- 

 tinuing in South America through Colombia, Venezuela, eastern 

 Peru, and Brazil to northern Argentina. The far northern birds 

 (subspecies M. ni. insolens) are migratory, moving southward after 



Figure Z7. — Streaked flycatcher, papamoscas rayado, Myiodynastes iiiaculatus 



difficilis. 



the breeding season. At the southern end of the range the very dark 

 birds that nest in Argentina, at the approach of southern winter move 

 north through the Amazon region, as far as southeastern Colombia 

 and southern and eastern Venezuela. 



Two ot the six geographic races currently recognized are found 

 in Panama, one resident, the other as a migrant from the north. 



