See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1866
1869
1872

like 1859 1860 1861
into it like 1866 1869 1872

1 blocks not present in 1860 1861 1866 1869 1872; present in 1859
Even in so extreme a case as this, if the supply of insects were constant, and if better adapted competitors did not already exist in the country, I can see no difficulty in a race of bears being rendered, by natural selection, more and more aquatic in their structure and habits, with larger and larger mouths, till a creature was produced as monstrous as a whale.

of a species 1859 1860 1861 1866 1869
OMIT 1872

of their own 1860 1861 1866 1869
both of their own 1859
proper to their 1872

on my theory, 1859 1860 1861 1866
OMIT 1869 1872

( Colaptes campestris ) which has two toes before and two behind, a long pointed tongue, stiff pointed tail feathers, but not so stiff as 1861
which in every essential part of its organisation, even in its colouring, 1859 1860
( Colaptes campestris ) which has two toes before and two behind, a long pointed tongue, stiff pointed tail-feathers, but not so stiff as 1866
( Colaptes campestris ) which has two toes before and two behind, a long pointed tongue, pointed tail-feathers, sufficiently stiff to support the bird in a vertical position on a post, but not so stiff as 1869
(Colaptes campestris) which has two toes before and two behind, a long pointed tongue, pointed tail-feathers, sufficiently stiff to support the bird in a vertical position on a post, but not so stiff as 1872

typical woodpeckers (yet I have seen it use its tail when alighting vertically on a post), and a straight strong beak. 1861 1866
harsh tone of its voice, and undulatory flight, told me plainly of its close blood-relationship to our common species; yet it is a woodpecker which never climbs a tree! 1859 1860
typical woodpeckers, and a straight strong beak. 1869 1872

and then proceeding to another, like a kestrel, and at other times standing stationary on the margin of water, and then dashing like a kingfisher at a fish. In our own country the larger titmouse (Parus major) may be seen climbing branches, almost like a creeper; it
sometimes,
often,
like a shrike, kills small birds by blows on the head; and I have many times seen and heard it hammering the seeds of the yew on a branch, and thus breaking them like a nuthatch. In North America the black bear was seen by Hearne swimming for hours with widely open mouth, thus catching,
like
almost like
a whale, insects in the water.
As we sometimes see individuals of a species following habits
widely
widely
different from those of their own species and
to
of
the other species of the same genus, we might
expect
expect,
on my theory, that such individuals would occasionally
have
have
give
given
rise to new species, having anomalous habits, and with their structure either slightly or considerably modified from that of their
proper
proper
type. And such instances
do
do
occur in nature. Can a more striking instance of adaptation be given than that of a woodpecker for climbing trees and
for
for
seizing insects in the chinks of the bark? Yet in North America there are woodpeckers which feed largely on fruit, and others with elongated wings which chase insects on the
wing;
wing.
and on
On
the plains of La Plata, where
hardly
not
a tree grows, there is a
woodpecker,
woodpecker
( Colaptes campestris ) which has two toes before and two behind, a long pointed tongue, stiff pointed tail feathers, but not so stiff as in the typical woodpeckers (yet I have seen it use its tail when alighting vertically on a post), and a straight strong beak. The beak, however, is not so straight or
so strong
strong
as in the typical
woodpeckers,
woodpeckers;
but it is strong enough to bore into
wood.
wood;
and
and
I
I
may
may
mention,
mention,
as
as
another
another
illustration
illustration
of
of
the
the
varied
varied
habits
habits
of
of
the
the
tribe,
tribe,
that
that
a
a
Mexican
Mexican
Colaptes
Colaptes