242 



VERTEBRATA 



FIG. 276. Red-eyed vireo. 

 Photograph one half life 

 size. 



Fm. 275. Cedar bird one third life size. 

 Photographed in Academy of Natural Sci- 

 ences. 



United States throughout the 

 winter. The white-breasted nut- 

 hatch seeks its food running up 

 and down the trees in summer 

 and feeds on seeds in winter. The black-capped chick- 

 adee or titmouse may be identified by its black crown 

 and throat. According to recent investigations if we 

 could persuade enough of these birds to dwell with us, 

 the plant lice pest, costing millions of dollars annually, 

 would be at an end. Over five thousand eggs of plant 

 lice have been found in the stomach of one chickadee. 

 Eggs of other injurious insects, as well as the adults, are 

 also eaten in large numbers. 



Thrushes (Turdidae). The robin is by many wrong- 

 fully considered a harmful bird on account of the cherries 



