In the age of mammals, mammals did, do well in the scramble to fill the ecological niches suddenly vacated by that catastrophe, for there are now about 6,500 species of them. But several other groups were equally, if not more successful and other species’ such as birds of about 11,000 of them and Lizards of about 7,000. However, there is yet another set of terrestrial vertebrates that prospered post-impact, but which are sadly neglected by zoologists. These are snakes. With almost 4,000 representatives, they are not as speciose as mammals. But they are not far behind. why do you we have such a great number of snake species ?

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