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This is a cormorant. His natural food is fish.
He swims underwater and catches the fish in his bill, then comes to
the surface and swallows the fish. His feathers
absorb water to make him neutrally boyant
underwater, just the opposite of a duck, whose
feathers repel water to make him float.
In Japan, the cormorant used to be used by
fishermen to harvest fish from the sea. The
fisherman would have 10 to 20 of these birds and
would place a small metal band around their neck.
This metal band would not harm the bird, but it
would prevent him from swallowing a "whole fish"..
The birds roosted on the sides of the fisherman's small boat and
dive into the water. When they caught a fish, they
brought it back to the boat. The fisherman would
then give the bird a small piece of fish that the
bird could swallow as a reward.
The cormorant can often be seen sitting with its
wings spread, drying its feathers. This made the
bird lighter so it is easier for him to fly home
for the night.
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