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Giraffes were first differentiated from cervids in the early Miocene. The earliest giraffe fossils are climacoceras and canthumeryx. Later, it evolved paleotragus, an early Miocene giraffe ancestor with short horns and a short neck.
By the late Miocene, Gulin evolved into Samotherium. In the Pliocene, the satsuma beast diverged into two branches, one was the okapi and the other was the earliest modern giraffe. The okapi is one of the only two remaining animals in the giraffe family, and its physiognomy basically reflects that of the Miocene giraffe.
There is also an evolutionary branch of giraffes, called the Xiwa beast, which is a stout animal with four horns. Now extinct. Bronze statues of some animals have been found in Sumerian cultural sites, resembling the Siwa beast.
This suggests that it is likely that the Cyllum survived in the Middle East until thousands of years ago.
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According to paleontologists, giraffes originated in Asia. In particular, in some parts of China and India, the ancestors of giraffes lived from more than 20 million to 23 million years ago, but the necks and legs were not as long as in modern times. Later, due to the changes in the earth's ecological environment and climate, there was a lack of food, and the giraffes with shorter necks died one after another because they could not reach the leaves on the tall trees, while the ones with longer necks survived tenaciously.
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I think it's a horse.
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Long-necked dragon? I seem to have heard of this name.
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Ancestors lived in the arid regions of Africa...
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No. Giraffes are not deer-like animals.
In terms of classification, giraffes belong to the subclass Mammalian subclass Euzozoan subclass Artiodactyl, Ruminant suborder, Giraffe family, and Giraffe genus, while deer belong to the deer family in Artiodactyl and Ruminant suborders, and giraffes are two groups of animals.
However, according to scientists, giraffes were differentiated from cervids in the early Miocene, and their ancestral appearance is the same as that of ordinary cervids. It's just that they parted ways with deer on the road of evolution.
Until now, there are only two species of animals left in the giraffe family, one is the okapi and the other is the modern giraffe.
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Behavioral habits. Giraffes have a very keen sense of hearing and vision. The eye can see what is behind them, but they rarely make sounds.
Male giraffes are more "belligerent", fighting for a long time, surrounding each other, like two people fighting each other, and neither of them will leave first.
Giraffes get very little sleep, generally only two hours a night, and sleep can sometimes put them at risk. Giraffes sleep standing most of the time, usually standing and sleeping in a state of false sleep. Because the neck is too long, giraffes often rest their heads against branches when they sleep so that their necks are not too tired.
When giraffes enter the sleep phase, they, like elephants, need to lie down and rest, which lasts about 20 minutes. Giraffes rarely make sounds, and they can quickly search for infrasound waves that humans can't hear.
Food habits. Giraffes live in packs. Sometimes mixed with zebras, ostriches, antelopes, diurnal.
He has a keen sense of smell and hearing, is alert and timid, usually walks leisurely, but runs quickly (up to 70 km/h). Foraging in the morning and dusk, in the wild, mainly eating all kinds of leaves, especially the leaves of the genus Mimosa, a giraffe can ingest 63 kg of leaves and twigs per day. Thirst-tolerant, can go a year without water when the leaves are well hydrated.
Giraffes mainly eat a variety of leaves, especially those of the genus Mimosa, and a single giraffe can ingest 63 kg of leaves and twigs per day. Thirst-tolerant, can go a year without water when the leaves are well hydrated >>>More
To put it simply, it is the survival of the fittest, the survival of the fittest. >>>More
The interesting thing about giraffes is that if they fall, they can't get up on their own strength alone, and they need the help of the staff, and giraffes rarely make sounds, so they are easily frightened, and in severe cases, they will die because of fright. >>>More
Biological evolution is one-way and there is no turning back. Once a certain evolutionary route has been chosen, it must be strengthened and perfected, and it cannot be reverted back to the original state. When organisms reproduce their next generation, they will select individuals with strong bodies and good genes, which is called sexual selection. >>>More
1. The neck can make a giraffe.
Eat food from higher places, and when food is scarce, some of the low bushes become more competitive food, and giraffes can eat food from higher and farther places with their long necks. Like some young leaves on top of the bushes, so that they can avoid competition and thus be fed and survive. >>>More