685. Wilsonia pusilla 

 WILSON'S WARBLER. 5 inches 



Male. Above bright olive-green; head yellow, with black cap. 

 Below yellow; no wing bars nor tail spots. Female. Similar, 

 but lacks black cap. 



Also called Wilson's Blackcap. Active birds found in the under- 

 brush, flycatcher manner. A migrant in Massachusetts. Arrives 

 about May 10. 



Song. A few weak, rapid notes. 

 Nest. Of leaves and grasses, on the ground. 

 Breeds. Northern New England and eastern Maine. 



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