| Initial letter | Clue | Organism's name ending in O | % Correct |
|---|---|---|---|
| D | Wild Australian dog | Dingo | 100%
|
| F | Long-legged, pink water bird | Flamingo | 100%
|
| A | Latin American mammal with a leathery armour, distantly related to anteaters | Armadillo | 95%
|
| H | Huge mammal of African rivers | Hippo | 95%
|
| K | The largest marsupial, an Australian mammal with a pouch for its young | Kangaroo | 95%
|
| M | Unpopular biting insect with a Spanish name | Mosquito | 95%
|
| B | Bison | Buffalo | 91%
|
| C | A brood parasite, a bird which lays its eggs in the nests of other species | Cuckoo | 86%
|
| R | Horned beast which is the next-heaviest land animal after the elephant | Rhino | 77%
|
| I | Species of sparrow named after a character from Shakespeare's Othello | Iago | 59%
|
| W | Relative of the cow from southern Asia, with an aquatic name | Water buffalo | 41%
|
| E | Cross-breed of an American Eskimo dog and miniature poodle | Eskipoo | 27%
|
| P | Rat-like marsupial whose name contains words for "pan" and a more famous bouncing marsupial | Potoroo | 18%
|
| Q | Royally-named fish whose second word could be a nickname for "Daniel" | Queen danio | 14%
|
| L | Lizard with large round toes for adhering to surfaces, and whose long rear section resembles a green part of plants | Leaf-Tailed Gecko | 9%
|
| O | South American member of the raccoon family, with a language-related name | Olingo | 9%
|
| T | African bird sometimes called the go-away-bird | Turaco | 9%
|
| J | A genus of North American songbird, which is also a type of sparrow | Junco | 5%
|
| S | Warbler-like bird with a grey colour resembling roofing material | Slaty vireo | 5%
|
| U | Bear-like version of marsupial K which likes going up conifers and the like | Ursine tree-kangaroo | 5%
|
| Y | Brood parasite with a banana-coloured beak | Yellow-billed cuckoo | 5%
|
| G | Multi-coloured fish sometimes used in fishtanks | Glowlight danio | 0%
|
| N | Mysterious nocturnal bird of the American tropics with a similar name to P | Northern Potoo | 0%
|
| V | Tiny species of lizard from a British Caribbean territory | Virgin Islands Dwarf Gecko | 0%
|
| X | Lizard with plant-like feet, bearing the name of an ancient Anatolian city | Xantus leaf-toed gecko | 0%
|
| Z | Black and white striped Brazilian fish | Zebra pleco | 0%
|