Summary:
- Many mammals live in social groups.
- Social living evolved because it is adaptive.
- Mammals may have limbs that are specialized for a particular way of moving.
- They may be specialized for running, jumping, climbing, flying, or swimming.
- The fastest land animal is a predatory mammal.
- Can you guess what it is?
- Racing at speeds of up to 112 kilometers (70 miles) per hour, the cheetah wins hands down.
- That’s because the limbs are attached beneath the body, rather than at the sides as in reptiles (see Figure below).