What kind of animal is a penguin, and what food does it usually eat?

“Little penguins look so proud, li a li a li, wearing those black clothes with white bellies puffed out” - this nursery rhyme vividly describes the appearance of penguins, and this was also the first time I learned about penguins when I was a child. Later I saw real penguins on TV, and they were very cute, waddling when they walked, always in groups. Now let us take a look together at what kind of animal is a penguin? What food does it usually eat?

1. What kind of animal is a penguin?

Penguins are marine birds, and like the ostrich we are familiar with, they are birds that cannot fly. However, according to relevant information, penguins in the past could fly, and in order to adapt to life in the ocean, their wings gradually degenerated and became flippers capable of swimming, which is the appearance of the penguins we see today.

Why do we say penguins are birds? We know that birds are oviparous vertebrates with feathers, and they can be divided into three categories:

First, birds that can walk but cannot fly, similar to the ostrich;

Second, birds that can swim and dive but also cannot fly, just like penguins;

Third, birds with well-developed wings that can soar freely in the sky, which are the flying birds commonly seen in our lives, such as swallows and sparrows.

Penguins are very typical seabirds, and their swimming ability reaches a level that other birds cannot achieve. This is because many water birds rely on very long webbed feet to paddle through the water and move forward when swimming and diving. Although penguins also have such webbing, it only serves to control direction; when paddling in the water, they mainly rely on their wings, so they can swim continuously in the water.

2. What food do penguins usually eat?

Penguins mainly eat plankton in the ocean as food, and Antarctic krill is their main food. Of course, they also prey on some small fish, squid, and brachiopod-like creatures.

Penguins have a very good appetite, and one penguin can eat about one and a half jin of food. They are also good helpers in maintaining the food chain in the ocean. Antarctic krill is basically preyed on by penguins, accounting for a large part of the krill eaten by whales.

It is understood that penguins are very ancient swimming birds, and they were already present in Antarctica before the ice sheet formed. Antarctica has relatively more land and a broad sea level, and their eyes have very flat corneas, so they can see things at the bottom of the water very clearly. Their eyes can transmit images to the brain and can function as a telescope, giving them a telescopic effect. Although penguins do not have teeth, this does not affect their eating, because penguins have barbs on their tongues and upper palates, which can fully play their role when swallowing food.

The above is the answer to the questions of what kind of animal a penguin is and what food it usually eats. I hope it is helpful to you.