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Across 3. are pinnipeds characterized by external ear flaps, long foreflippers, the ability to walk on all fours, and short, thick hair. 5. is any of a number of species of amphibians in the order Anura (frogs) characterized by dry, leathery skin, short legs, and snout-like parotoid glands. 7. is a mainly day-flying insect of the order Lepidoptera, which includes the butterflies and moths. 8. is any of the animals in the genus Sus, within the Suidae family of even-toed ungulates. 9. are marine mammals closely related to whales and porpoises. 11. are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. 14. constitute the bird clade Columbidae that include some 310 species of near passerines. 16. are social insects of the family Formicidae ( /fɔrˈmɪsɨdiː/) and, along with the related wasps and bees, belong to the order Hymenoptera. 17. is one of two extant subspecies of Equus ferus, or the wild horse. It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. 18. is the largest cat species, reaching a total body length of up to 3.3 metres (11 ft) and weighing up to 306 kg (670 lb). It is the third largest land carnivore (behind only the Polar bear and the Brown bear).

Down 1. is a large flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere. 2. are large land mammals in two extant genera of the family Elephantidae 4. is a freshwater fish in the family Cyprinidae of order Cypriniformes. It was one of the earliest fish to be domesticated, and is one of the most commonly kept aquarium fish. 6. are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms. 10. is a cephalopod mollusc of the order Octopoda. 12. are elongate, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. 13. is a small, usually furry, domesticated, carnivorous mammal. 15. is a subspecies of the gray wolf , a member of the Canidae family of the mammalian order Carnivora.