| 100% | ADDERS | 6 | Venomous snakes with zigzag patterns on their backs |
| 48% | ADDER | 5 | Venomous snake with zigzag markings |
| 42% | TREEBOA | 7 | Snake with "lightning bolts" on its back |
| 37% | TORTOISES | 9 | Large land reptiles with a shell on their backs |
| 37% | MACKEREL | 8 | Migratory pelagic fish with a pattern on its back |
| 37% | VIPERS | 6 | Venomous snakes with fangs |
| 36% | COBRAS | 6 | Venomous snakes with big hoods |
| 36% | COBRA | 5 | Venomous snake with a hood |
| 35% | VIPERS | 6 | Venomous snakes with long, hinged fangs |
| 34% | TENS | 4 | The U.S. Treasury is on their backs |
| 34% | DIMES | 5 | They have torches on their backs |
| 34% | KOALAS | 6 | Ones carrying babies on their backs |
| 34% | SEAOTTERS | 9 | Mammals that float on their backs |
| 34% | ADDER | 5 | Common viper with a zigzag pattern along its back |
| 34% | CAPES | 5 | Many superheroes wear them on their backs |
| 34% | OTTERS | 6 | Sea mammals that float on their backs |
| 32% | FANGED | 6 | Describes snakes with venomous teeth |
| 32% | ELAPIDS | 7 | Family of venomous snakes, with cobras and mambas |
| 31% | LUGES | 5 | 59-Across varieties designed for riders to lie on their backs |
| 31% | SUBTWEET | 8 | Talk about someone behind their back on Twitter |
| 30% | TWOS | 4 | U.S. bills that depict the Declaration of Independence signing on their backs |
| 30% | COBRA | 5 | Venomous snake of Africa and Asia with an inflatable neck hood |
| 30% | COBRAS | 6 | Venomous tropical snakes with hoods |
| 29% | VENOMOUS | 8 | Snakes and spiders with toxins in their fangs |
| 29% | MEDUSA | 6 | Lady with snakes on the head |
| 29% | LIARS | 5 | People with their pants on fire? |
| 29% | DESKTOP | 7 | With 20-Across, pattern in back of a window |
| 29% | PEACOCKS | 8 | Birds with eyelike spots on their tails |
| 28% | TEAEGG | 6 | Chinese snack with marblelike patterns on the outside |
| 28% | OATER | 5 | "They Died With Their Boots On," e.g. |