At Times The Carrancha Is Noisy, But Is
Not Generally So:
Its cry is loud, very harsh and peculiar, and
may be likened to the sound of the Spanish guttural
G, followed
by a rough double r r; when uttering this cry it
elevates its head higher and higher, till at last, with its
beak wide open, the crown almost touches the lower part of
the back. This fact, which has been doubted, is quite true;
I have seen them several times with their heads backwards
in a completely inverted position. To these observations I
may add, on the high authority of Azara, that the Carrancha
feeds on worms, shells, slugs, grasshoppers, and frogs; that
it destroys young lambs by tearing the umbilical cord; and
that it pursues the Gallinazo, till that bird is compelled to
vomit up the carrion it may have recently gorged. Lastly,
Azara states that several Carranchas, five or six together,
will unite in chase of large birds, even such as herons. All
these facts show that it is a bird of very versatile habits and
considerable ingenuity.
The Polyborus Chimango is considerably smaller than the
last species. It is truly omnivorous, and will eat even bread;
and I was assured that it materially injures the potato crops
in Chiloe, by stocking up the roots when first planted. Of
all the carrion-feeders it is generally the last which leaves
the skeleton of a dead animal, and may often be seen within
the ribs of a cow or horse, like a bird in a cage.
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