Definite evidence shows that both the length and the duration of
the migratory journey vary greatly. The bobwhite and the western
quails, the cardinal (_Richmondena cardinalis_), the Carolina wren
(_Thryothorus ludovicianus_), and probably some of the titmice and
woodpeckers, which are apparently nonmigratory, may round out their
full period of existence without at any time going more than 10 miles
from the nest where they were hatched.