When I was searching for ankies on herbivore island, I heard this sparkling noise. I immediately thought "Unicorn? Where?". Then, I found it's rainbow poop. I walked a little, and found this guy. I am a pretty low level, and I'm not prepared to tame one anyways, so I left it be.
For beginner mobile players, if you happen to come across a unicorn, remember the area in which you found it because come later game, you have to take a picture of a unicorn for a pursuit 👍 I found it once and can’t seem to find it again to take the picture 🤦♂️😔