retaining
nearly the
same
instincts.
For
instance,
we can
understand
on the
principle
of
inheritance,
how it is
that the
thrush of
South
America
lines its
nest with
mud, in
the same
peculiar
manner as
does our
British
thrush:
how it is
that the
male wrens
(Troglodytes)
of North
America,
build
“cock-nests,”
to roost
in, like
the males
of our
distinct
Kitty-
wrens,—a
habit
wholly
unlike
that of
any other
known
bird.
Finally,
it may not
