Whenever I see this picture I think of this:
| Creature | Swims | Walks | Flies |
| -------- | ----- | ----- | ----- |
| Dog | X | X | |
| Fish | X | | |
| Bird | | X | X |
| Duck | X | X | X |
Notice how for each combination of swimming, walking and flying, there is a living creature that can do just that, with the exception of swimming and flying.
Sure there are flying fish, but they glide rather than fly. Did evolution really forget to cover this niche?
Dragonflies.
Their nymph phase is aquatic and in their adult phase they only fly. Their legs are only for grasping.
Pretty sure I’ve seen dragon flies crawling along plants on land?
They can shift around a little bit, but they don’t really walk as a means of travel.
Good idea! I think fireflies can walk (over short distances), but maybe there are other insects close to water that can’t.