Why Do Chinstrap Penguins Constantly Blink Their Eyes? 为什么帽带企鹅不停地眨眼睛？

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Chinstrap penguins get their name from the thin black line under their chins， which looks like a strap holding on a black hat or helmet. Like other penguins， they spend much of their time in the water， catching fish to eat. But when the time comes to raise their young， they return to land.

Raising young penguins is a challenge. The eggs are often laid in nests made of small rocks to keep the eggs from freezing. One parent takes care of the nest for long periods of time， while the other parent hunts for food.

The parent must constantly keep a sharp lookout. Birds called brown skuas target the eggs and young penguins. Other penguins in these crowded areas may take stones from the nest， putting the young in danger.

But it’s hard to stay alert and protect a nest 24 hours a day. Getting a good night’s sleep could be deadly for the young. So chinstrap penguins have found a way of solving the problem.

帽带企鹅的名字源于它们下巴下面的一条细黑线，看起来像系在黑色帽子或头盔上的一条带子。（剩余1766字）