Here are some various animals to adorn your overworlds...

Sheep: These started as some random front on tiles I found in DoR that were going unused...I drew them sideways and added their back ends. I like to animate the front half at 24 and the back half at 4. These grazing ungulates can add some variation to the cows that are used so often...they're not perfect, so if you can make them better, go for it.

Bees: Instead of a butterfly...use a bee. Or a swarm of them. You can animate all 16 tiles in a row if you like...but I prefer just to go with 8 tiles so that they always face the same direction. On row of these is a little higher in the tile than the other so that you can layer them on top of each other for a swarm effect...not sure what speed I use, something relatively fast though (around 4 to . I use cset 8 in DoR. You can turn them into Keese-like enemies or put damage combos underneath them so that you get stung if you walk into them. Drew these myself.

Turtles: Started as rips of a 32 x32 tile from somewhere, but I basically had to redraw them to get them 16 x 16. Use these as enemies for best effect, though they are mostly just for atmosphere...I make them into very slow walking, slowly animated walkers that are shielded on 3 sides so that you have to hit them on the front to kill them...

Radien for the start of the sheep tiles that were in DoR.