If your on mobile and can’t find one of these guys start the tame equus pursuit and walk or fly around the island and eventually a arrow will show up on the top left of your screen. If you follow that then you will find an equus or two. Upvoote if you found this helpful.
So on mobile go to herbivore island there should be a way to get too the normal part of the map by a indent on the land, there is a swamp beside it and you will find 3-6 equus and also I would bring 30 rockcaroots for a level 4 equus because it is actually pretty hard and they spoil easily
Put this higher !!So if you play mobile I found 3 in the same spot okay so first do the volcano pursuit the one where it's the cave inside the pursuit should be south of the equator and in that general area if you look around you'll find them