r/AskBiology

If you have to be able to reproduce to be considered living, what happens if your infertile?

Have animals around the world developed different ways of communicating with each other, similar to how humans have different languages and accents? Do animals from different regions have distinct vocalizations or forms of communication that other populations of the same species might not understand?

I am not well informed in biology or taxonomy, but from a layman's perspective, fungi seems mysterious to me because it is not an animal nor a plant. Why so? Why is it classified as a different type of living being?

So I'm a huge fan of the show My Little Pony, and while it wasn't extremely common, the animators occasionally showed elderly ponies using walkers or canes. They're typically shown being used by elderly ponies, so I believe the implication is that they need them for the same typical reasons elderly humans need them.

But from what I understand, the main reason why humans need aids like walkers and canes is because we're bipedal. So I feel like a wheelchair designed for quadrupeds would be the proper mobility aid, right?

If they were intelligent enough to understand how to use walkers or canes, would there ever be a situation where they'd be the preferred mobility aid over wheelchairs?

Are seals, walruses or other mammals showing evolution in the direction of being more permanently in the water?

I know that in general birds can see all the colors humans can. They tend to have three or four color receptors. Some birds have even more!

What I’m wondering is if birds CAN be colorblind, the same way humans can?