FAMILY CHARACTERS O 



our limits all winter ; our summer residents of tliese species 

 may possibly pass on south of us, and their places be sup- 

 plied by others of the same species from furtlier north- Qlie 

 Red Crossbills have, however, not only quite lost the migra- 



FiG. T) 





vlwrfi 



Vocal Organs of the Evening Grosbeak. 

 B,B, 9, Bterno trachealis : C. B, A, bronchlalis : f, g, lower tracheal ring: d, i, Y-sbaped 

 muscle: v, vibiating surface : a, os-transversiile. 



ting instinct, but also that love for any particular locality 

 which causes birds of most other species to return jear after 

 year to the section in which they were born. They have, in 

 short, become true nomads, wandering up and down the land 

 seeking food where it is most abundant, and breeding at va- 



