Nearly 2M of those are insects, plants or fungi, and none of these made it into the list of 21 here. There are under 100k distinct "animals" in the sense we us

Nearly 2M of those are insects, plants or fungi, and none of these made it into the list of 21 here. There are under 100k distinct "animals" in the sense we usually think of the word (mammals, reptiles, birds).