No one even knows the true number of species in the world, they say.

The total number of species in the order is now about 1300.

They were of a species we had never seen before.

The average life of a species is about five million years.

So he did have a name, like others of his species.

I was a very old man, for one of my species.

He knew nothing much about her, and she was not even of his species.

But I'd love to try a few more of the species.

The most recent report of the species is from 2003.

Some of the species are more than three feet long.