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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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