Book excerpt: Whose foot is this? An intriguing close-up of an animal's foot piques curiousity that's satisfied on the following page with a stunning full-size photo of the animal itself and a brief description of how the foot is used. A tiger stalks its prey on velvet paws. A gecko's ribbed feet enable it to climb walls as smooth as glass. The mole uses its feet for digging. The webbed feet of a duck help it swim. Rabbits and kangaroos have feet adapted for jumping fast and far. Caterpillars, starfish, and octopuses all use their feet to grab hold. The guessing-game format makes learning about natural adaptation fun. Includes an index of all animals illustrated.