In the yearly submerged gapo forests and the plains of the Upper Amazon,
a singularly deep and long-sustained flute-like sound is often heard.
It might be supposed that it was produced by the pan-pipes used by the
natives of that region. It is, however, the note of a bird, named by
the Indians _uira mimbeu_, or fife-bird, from the peculiar tone of its
voice. It is, from the ornament on its head--consisting of a crest,
with long curved hairy feathers, having long bare quills; which, when
raised, spread themselves out in the form of a fringed sunshade over the
head--called the umbrella-bird (Cephalopterus ornatus). It resembles in
size and colour the common crow. In addition to this umbrella-like
ornament on its head, it has what may be called a pelerine suspended
from the neck, formed by a thick fan of glossy steel-blue feathers which
grow on a long fleshy lobe or excrescence. This lobe is connected with
an unusual development of the trachea and vocal organs, undoubtedly
assisting the bird to utter its strange note. While singing, it draws
itself up on the bough, spreads widely out the umbrella-formed crest,
waves its glossy breast lappet, and then, in giving vent to its loud,
piping note, bows its head slowly forward.
The female has only the rudiments of a crest and lappet, and is of a
much duller colour than the male.