Are penguins mammals?

The penguin is like a western gentleman in a tuxedo on land, swaying and embarrassed in the face of danger, but its short wings in the water have become a pair of powerful "paddles". The swimming speed can reach 25 to 30 kilometers per hour and 160 kilometers a day. Let's take a look at whether penguins are mammals.

Are penguins mammals?

Penguins are not mammals. The important sign of mammals must be viviparous, while penguins are oviparous. The life history of penguins varies with the size and geographical distribution of the species, and the reproductive cycle of the same species is also related to latitude. Some species migrate long distances to ancestral nests inland to lay eggs. Spotted-billed penguins and small blue penguins breed twice a year, most species only once a year, and king penguins reproduce twice in three years. King penguins and emperor penguins lay one egg at a time, while other species produce two and occasionally three eggs. Most penguins breed in spring and summer in the southern hemisphere, and some populations of Papua penguins also breed in winter. Emperor penguins take a long time to develop, so they begin to breed in autumn so that their chicks can produce in the summer, when the survival rate is best.

What kind of animal are penguins?

Penguins are birds. Penguins are typical seabirds. Although they can't fly, they are super swimmers among birds. Many waterbirds swim by rowing their webbed feet in the water. Although the penguin's feet are webbed, they are only used as a rudder to control the direction. The strength to move forward depends on the paddle-like wings that flutter and fly in the water. Penguins swim very fast. Emperor penguins can swim about 10 kilometers an hour, while white-topped penguins have a record of 36 kilometers an hour, which is the fastest of all birds. Penguins often swim in the dolphin style, that is, diving for a distance, rise to the surface for air, and then dive to continue swimming. In fact, penguins are also the champion divers among birds, with a record of diving for 18 minutes and 265 meters.

Why can't penguins fly?

There have long been several theories explaining why penguins cannot fly. One view is that some species lose their ability to fly because of a lack of predators on the ground. Another point of view is the biomechanical hypothesis that birds must use wings to do two different tasks when flying and diving, and it is impossible to create wings that are good at both. Penguins once faced an evolutionary choice between flying in the air or swimming flexibly under water, and their flight ability became weaker and weaker as their wings became more efficient when diving. At some point, flying becomes very laborious, so the best option is to give up flying and shrink the wings into flippers.

What kinds of penguins do you have?

Penguins are usually regarded as symbols of Antarctica, but the most species of penguins are distributed in the south temperate zone, where there are more islands in the Central and South Ocean, South America and New Zealand. There are 6 genera and 13 species of penguins nesting here, 2 of which are limited to Australia and New Zealand. The largest genus of penguins is also distributed in Australia and New Zealand. The second largest genus of penguins is mainly distributed in the subtropics and tropics, even near the equator, while there are only 2 genera and 2 species of penguins nesting along the coast of the Antarctic continent and 2 genera and 2 species in the subAntarctica, while only the emperor penguins survive the winter in the Antarctic continent. There are 18 species of penguins living in the world. they are small white-finned penguins, white-finned penguins, yellow-eyed penguins, Magellan penguins, Peruvian penguins, Galapagos penguins, emperor penguins, king penguins, Adri penguins, Antarctic penguins, Papua penguins, Schiff's horn penguins, horned penguins, Marconi horn penguins and right-crowned penguins.