340 OHIO EXPERIMENT STATION. 



GENUS SIALIA SWAINSON. 



183. Sialia sialis (LINN.). 

 Bluebird. 



Abundant ; usually a permanent resident, though less numerous in winter, but if 

 this season be especially severe, is probably altogether absent. Those individuals of 

 the species which migrate south for the winter apparently return in February. 



The breeding season extends from the middle of April to about the first 

 of August, two or three broods being reared. A nest found May 25, 1890, in a 

 small decaying stump, contained well fledged young and one addled egg. The en- 

 trance to this nest was only one foot above the ground. 



The Bluebird sings regularly from about the middle of February until late in 

 June, but much less frequently thereafter. It may at intervals, however, be heard 

 till October, the latest recorded date of song being October 21 (1892). 



