Why does it seem like birds can come in all different colors, but other animals aren’t?

Question

There’s blue, green, red, purple, etc. birds but most other animals are just brown/black/white. Why is that?

And follow-up question: Would it be possible to genetically modify an animal’s fur to make it a different color?

edit: To the one guy who commented here: Mate, I think you’re shadowbanned. I can’t see your comment.

In: Biology

Answer 1

I think a big part of color variation is due to camouflage for survival. Most animals that are ground-bound have to blend in better with the color palette of the earth (browns, greys, whites, tans) while birds have the luxury of flying. Plus, male birds have evolved to be so bright in color because it attracts females more.