| 100% | OTTERS | 6 | Mammals that congregate in groups called "rafts" |
| 83% | OTTERS | 6 | Marine mammals that rest in groups called rafts |
| 68% | DOLPHINS | 8 | Marine mammals that gather in groups called pods |
| 42% | BATS | 4 | Mammals that fly in caves |
| 42% | OTTER | 5 | Mammal that swims in rivers |
| 41% | POPLARBEAR | 10 | Mammal that lives in a cottonwood? |
| 41% | BAT | 3 | Mammal that hangs in a cave |
| 40% | BAT | 3 | Mammal that hangs upside-down in caves |
| 40% | WHALE | 5 | Mammal that swallowed Pinocchio in the movie |
| 40% | TBIRDS | 6 | Group led by 15-Across that was called the Burger Palace Boys in the original Broadway production of 43-Across (Hyph.) |
| 40% | MARSUPIAL | 9 | Mammal that carries its baby in a pouch |
| 39% | DOLPHINS | 8 | Marine mammals that often appear in dreams |
| 38% | SWAT | 4 | With 52-Across, group called in hostage situations |
| 38% | AARDVARK | 8 | African mammal that's first in the dictionary |
| 38% | PANGOLIN | 8 | A mammal that is covered in overlapping scales |
| 38% | BAT | 3 | Flying mammal that might roost in a cave |
| 38% | PTAS | 4 | Groups that get busy in Sept. |
| 38% | OTTER | 5 | Furry mammal that plays in rivers |
| 38% | UNION | 5 | Group that may call a strike |
| 38% | ARABLEAGUE | 10 | Group that suspended Syria in 2011 |
| 37% | CIVETS | 6 | Small mammals that secrete a musk used in perfumes |
| 37% | OTTERS | 6 | Aquatic mammals that may hold hands in their sleep |
| 37% | AARDVARK | 8 | Long-nosed mammal that's first in the dictionary |
| 37% | MARSUPIAL | 9 | A mammal that carries her young in a pouch |
| 37% | ROO | 3 | Australian mammal that might engage in boxing, for short |
| 37% | OTTER | 5 | Playful aquatic mammal that can be found in "potter" |
| 37% | BADGERS | 7 | Group of mammals found in a cete |
| 37% | WOMBATS | 7 | Group of mammals found in a wisdom |
| 37% | ORCAS | 5 | Large mammals in matrilineal groups |
| 37% | FLATEARTHSOCIETY | 16 | Group that doesn't believe in revolution? |