Hey, wait a minute. What exactly are X-ray photographs? ---
Arthropods and mollusks : The scorpion: What a cutie! - The giant prawn: Underwater knights - The bumblebee: Buzzing hourglasses - The dragonfly: Born stunt pilots - The butterfly: Bodybuilding caterpillars - The centipede: A head with legs - The snail: The mushiest mollusk ---
Fish : The eel: Swimming serpents - The silver pomfret: A bit of fish with your bones? - The roach and the perch: Fishy failures - The garfish and the barracuda: Sleek and speedy - The small-spotted catshark: Just a big old pussycat! - The John Dory: An underwater vacuum cleaner - The anglerfish: Fish that go fishing - The catfish: Who are you calling a tongue? - The sole: Art and sole - The ray: Bend or break - The seahorse: The odd fish out ---
Amphibians : The marsh frog: Why frogs are more skillful than princes - The tree frog: Eating with your eyes ---
Reptiles : The tegu: Tegunosaurus rex - The bearded dragon: A spiny beard - The long-tailed grass lizard: Snakes with legs - The monitor lizard and the python: A legless lizard - The crocodile and the python: A couple of losers - The chameleon: The tongue of death - The red-eared slider turtle: Cold-blooded centenarians - The constrictor: The bigger the appetite, the bigger the mouth ---
Birds : The barn owl: Big guy, huh? - The wagtail: Swimming in the air - The long-eared owl: Back-to-front knees - The buzzard: Out of hand - The pheasant: Mini-ostriches - The jay: Sleeping on one leg - The duck: Land-air-and-water birds - Songbirds: Spot the differences --
Mammals : The bat: Flap your hands - The mouse: Super-mice - The rat: Family feud - The shrew and the vole: A case of mistaken identity - The rabbit and the hare: Same but different - The mole: Mammals never have more than five fingers (even when they have six) - The hedgehog: A prickly mole - The weasel: As wise as a weasel - The squirrel: Handy little monsters - The fox: The tale of a tail - The deer: Living skeletons - The squirrel monkey: Monkey brains!