Question

what helps the water birds to keep their feathers dry?
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Answer 1

Answer:

The water-shedding micro-structures of flight feathers shed droplets off the birds' back. An oil gland at the base of the tail helps keep the feathers zipped up water-tight.

Explanation:

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Answer 2

Answer:

Birds pick up oil on their beaks, by rubbing against the uropygial or preen gland near the tail, and then rub it over their feathers. This coating insulates the interlocking barbules in the feather. As water cannot penetrate through the oil coating, the feather is waterproof.

Explanation:

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