They are mostly found ( in my experience ) Where Carnivores are ( Raptors, Carnos, terror birds etc. ) So you really have to make sure the area is safe enough so you can hop on the equus and feed it. I hope this helps!
This stinking thing!!! So annoying!!! I was taming it on a cliff and I was a bit slow and it knocked me off. RIGHT INTO A SWAMP. I swear, while everything was eating me, sarcophagus, titanoboa and mega parana, I saw it laughing at me.