They inherited the experience of countless generations, slowly acquired as the species extended its range westward... They furnish, too, an instance of one of the most important factors in migration- that is, the certainty with which a bird returns to the region of its birth.

Of this wonderful homing instinct which plays so vital a part in the migration of birds, i have no explanation to offer.


BIRD LIFE
by Frank M. Chapman 


i found this book at an estate sale at vista homes on the way home from the bird walk. i gave it to r., my bird girl.