What I mean is this below:
Dryosaurus itself is fairly large, but that doesn't mean it wouldn't be able to run up a horizontal sauropod's tail if it had to. You can see the size comparison below with both the aptosaurus and nigersaurus.
View attachment 143438View attachment 143439
When I say "hop onto and run up the tail of a sauropod, I mean that in an animation sequence, the sauro's tail would be lowered so that there is enough of a ramp the dryos can run up.
View attachment 143446
When it ends, they will jump off the sauropod from the neck or the head, but
only when their necks and heads are lowered to the ground, just enough for them to jump down safely. While they hop off, the sauropods would look at the pair confused, but with the nigersaurus, due to its smaller size, it would be rather a bit annoyed.
View attachment 143447
If you want a further reference, it was inspired by the cute dinosaur behavior from the
Dinosaur Revolution documentary, and by this piece of art from DeviantArt user,
AntoninJury:
https://www.deviantart.com/antoninjury/art/Stowaways--556152493
(Now, the othneilias are smaller and are merely just resting on the hesperosaur's back, but you probably get where I got the point of having the idea of small ornithopods being on the backs of bigger herbivores in general.)
And besides, despite being a
very low rating dinosaur in-game, it's also an endgame type dinosaur, in which you can unlock and acquire on Isla Sorna, the final island and location in the game's main campaign. So, why not make an endagme dinosaur that is
so cute already, more unique by making it so something else that other dinosaurs can't do in concept?