What is a Seabird?
Seabird is a kind of bird that can adapt to the marine climate environment. It is different from other birds in terms of living habits, attitude and physiological operation. It has a strong convergence evolution, so the ecological positions of all seabirds are very similar.
The species of seabirds first appeared in the Cretaceous, nearly 100 million years ago, but has little to do with modern seabirds. If we talk about the ancient ancestors of modern seabirds, it can be traced back to the Paleogene, and it has been tens of millions of years.
Generally speaking, seabirds live longer and breed later than other birds, and have the problem of population aging, but they enjoy their youth more. Most species of seabirds live together, dozens at a time and millions at a time. Most of them migrate regularly every year, and it is not uncommon for them to travel long distances across the red or around the earth.
It can forage on the surface of the ocean or underwater, but when it cannot forage, it may cannibalize. No matter in the ocean, the coast, or even in the land and air, we can fly for a long time without hindrance.
There are many kinds of seabirds. There are more than 9,000 species of birds in 156 families. There are 81 families and 1186 species in China, accounting for 14% of the world's bird species. They are more than those in India and Australia, and more than those in Europe and North America. They are the countries with the largest number of birds in the world.
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