Evolving communities
Ant eaters, bats, moles and whales are all early descendants of the first mammals and have developed elaborate specializations to eat other small and large animals, but there are other sources of nutriment to be trapped as well plants. This is the next step in the radiation of the placental animals, the first of which some creatures developed that ate grass and moved from the forest onto the plains to graze. They were followed by the flesheaters and in the open, the two inter-dependent communities evolved, side by side, each advance in hunting efficiency producing responses in defence from the hunted. A second group of creatures established their lives in the tree tops.
