In the humming-birds, we see the same perfect adaptation of their
construction to their peculiar wants which is found throughout the whole
animal creation. This is beautifully exhibited in the sickle-bill,
which is occasionally found in Bogota. Its bill is very short and
sharply curved, in order that it may enter the short, curved flowers of
that region. It is generally of a duller hue than most of its tribe.
Its head and small crest are blackish-brown, each feather having a spot
of buff on its tip. The upper part of the body is of a dark, glossy
green, slightly touched with buff. The under part is a brownish-black,
with a few buff streaks upon the throat and breast. It is about four
and a half inches long.