Butterflies

Butterflies are colored insects that make any minecraft world more alive. They come in a miriad of species and sizes.

Biome/Spawn
There are 5 species of butterflies now:

Blood Red-Glider (Cymothoe sangaris) are sorta common on Savanah Rocks.

Giant Saturn (Zeuxidia aurelius) are uncommon on Birch Forests.

Mexican Shoemaker (Catonephele mexicana) are common on Jungle Edges.

Pink Glasswing (Cithaerias phantoma) are rare on Jungles.

Gold-Tailed Red (Agrias claudina godmani) are uncommon on Jungle Hills.

Behavior
At this point butterflies use the Bat AI behaviors, so they will spawn most of times around caves on the surface, but i did notice them spawnning inside deep caves yet. They will die with 1 hit most of times and they can drop some Dyes eventually.

Taming/Breeding
No/No; maybe on the future a butterfly breeding system can be implemented. Players capture the butterflies to make domes and structures to display them or just release them near their houses.