294 



A COURSE ON ZOOLOGY. 



this they are aided by the stiff feathers of the tail. The 

 FIG. 245. 



< ^ - ' 



LAEK (Alauda arvensis). 

 FIG. 246. 



RAVEN (Corvus corax). 



wrens, chickadees, tits, wagtails, and sparrows are pas 

 seres, and, indeed, the order is named from the latter 



