QF EASTERN PENNSYLVANIA. 79 



sion of mischief is so rampant, that while abroad 

 in quest of food, the gratification of this unen- 

 viable trait often brings it into trouble. The 

 Blue Bird is especially the object of its annoya;nce. 

 During the temporary absence of the latter, the 

 Wren will enter her home and despoil it; then, as 

 if awakened by a sense of guilt, and fearful of 

 detection, instantly beats a cowardly retreat. 



The male is quite active in building, and ap- 

 parently executes the task alone, while his part- 

 ner stands aloof with the utmost complacency; 

 ever and anon she enters the box or cavity to in- 

 spect the character of the work. Nidification com- 

 mences about the i6th of May, and continues 

 during a period of 14 days. If a hnman being or 

 quadruped should stray into the vicinity, the most 

 vehement scolding ensues, and the utmost efforts 

 are exerted to expel the intruder. Oviposition 

 closely follows nidification. A single egg is daily 

 deposited, until the entire number which ranges 

 from seven to nine, has been laid. Whilst the 

 female is engaged in incubation, the male carefully 

 administers to her necessities, and in times of 

 danger, imperils his own life in her behalf He 

 is a most jealous and attentive husband. 



When not thus occupied, he freely enlivens her 

 tedious moments by an agreeable ditty. Should 

 he be disturbed while thus employed, by any of his 

 feathered brethren, he will ' suddenly break off in 

 the midst thereof, and seek to castigate the offender 

 for his insolence and temerity. 



