Mammals of the World

What’s inside

• Which characteristic is unique to mammals among the major living vertebrate groups?
• Which mammal is the largest animal known to have ever lived?
• What is the main ecological role of the echidna's long snout and sticky tongue?
• Which adaptation most directly helps camels survive in hot, dry deserts?
• The only mammals capable of true powered flight are [____].
• The egg-laying mammals of Australia and New Guinea are known as [____].
• A prolonged state of reduced metabolism and body temperature used by some mammals during unfavorable conditions is…
• The incisors of rodents have open [____], so they keep growing throughout the animal's life.