Ask Lemmy

Dragonflies.

Their nymph phase is aquatic and in their adult phase they only fly. Their legs are only for grasping.

These things:

https://en.wikipedia.org/wiki/Flying_fish

Flying Fish

Flying fish

Note that Markdown does tables:

|Creature|Swims|Walks|Flies|
|-|-|-|-|
|Dog|X|X||
|Fish|X|||
|Bird||X|X|
|Duck|X|X|X|

Yields:

The common loon flies and swims, but isn't able to walk.

Cormorants don't walk well... Their legs are set far back on their body for more efficient swimming.

I would vote for the gannet as able to fly and swim. They dive incredibly fast to catch fish, so they go deep, and once down there, they use their wings to swim after fish.

Great article here, with photos: https://www.naturettl.com/underwater-world-gannets/

A paraplegic seaplane pilot

It's called a @FlyingSquid@lemmy.world

Genus Chrysopelea, commonly referred to as flying snakes. Most snakes are perfectly fine swimmers, so I bet that Genus can swim as well.

All fish fly, just not through the air.

And, uh, The Common Loon is a creature that can swim and fly, but can't walk. It's feet are too far back to be able to walk.

Loon

We need to add digging/ tunneling to the grid.

I've always been of the opinion since fish can breathe underwater just like birds breathe above water, all fish are technically flying in their own environment.

I don’t think ducks walk; they waddle 😂

What about underground traveling, like burrowing?

Dolphins?

Here's an australian lungfish

Here's linda the lungfish

Did evolution really forget to cover this niche?

IANAScientist, but maybe being a creature that can potentially fly onto land but not be able to walk once there was an evolutionary disadvantage, and was bred out.

Ducks are birds

Only walk could be an ant, I guess, but what about only fly?