| Answer | Crossword Clue |
|---|---|
| MAN | Only creature that blushes |
| MAN | Only animal that blushes |
| MAN | "The only animal that blushes" |
| MAN | "The only animal that blushes," per Twain |
| MAN | "The only animal that blushes. Or needs to" |
| MAN | "... the only animal that blushes. Or needs to.": Twain |
| TWAIN | He said, "Man is the only animal that blushes. Or needs to" |
| monocardian | a creature that has only one heart |
| ephemerals | EPHEMERAL, a creature, such as a mayfly, that lives for one day only |
| ephemeral | existing only for a day, or short period / a creature, such as a mayfly, that lives for one day only |
