| REPTILIA | Class of cold-blooded vertebrates that includes the tortoises, snakes, lizards etc. (8) |
| AMPHIBIA | Class of cold-blooded vertebrates that includes newts, frogs etc. (8) |
| AVES | Class of vertebrates that includes the dawn chorus songsters blackbird, mistle thrush, robin and wren (4) |
| AESOPSFABLES | Collection of tales which includes 'The Tortoise and the Hare' (6,6) |
| REPTILES | Cold-blooded vertebrates of a class that includes snakes, lizards, crocodiles, turtles and tortoises (8) |
| REPTILE | To which class of cold-blooded vertebrates does a turtle belong (7) |
| SQUAMATA | Largest order of reptiles, comprising the snakes, lizards and worm lizards (8) |
| LAMPREYS | Primitive fish-like vertebrates that have sucking mouths but no jaws (8) |
| FISH | Angle of cold-blooded vertebrates |
| ANS | The part of the nervous system of vertebrates that controls involuntary actions of the smooth muscle |
| AMPHIBIAN | Any cold-blooded vertebrate of the class comprising the frogs, toads, newts, salamanders and caecilians (9) |
| WATTLE | A loose fold of skin hanging from the neck or throat of certain birds, lizards, etc. |
| FIRESIDES | Cold-blooded vertebrates mostly live in warm places (9) |
| AMPHIBIANS | Cold-blooded vertebrates which live on land but breed in water (10) |
| MAMMAL | A member of a group of vertebrates that suckle their young and are warm-blooded (6) |
| BIRDS | The class of modern flying vertebrates that are often considered to be present-day dinosaurs. |
| JAW | The part of a skull of a vertebrate that holds the teeth (3) |
| CHELONIAN | Any reptile of the order Testudines, comprising the tortoises, turtles and terrapins (9) |
| LAMPREY | Eel-like vertebrate that feeds on the blood of other animals (7) |
| NEWT | Colorful cold-blooded vertebrate |
