@thedinosaurhunter

Trumpeting into the 4th spot in the pack is the dinosaur that has a massive family named after them.

Hadrosaurus.

Meaning “Sturdy Lizard”, this duck-bill dinosaur belongs in the hadrosaurid genus and lived in North America during the Late Cretaceous. Known as the first dinosaur to be identified by more than just parts of teeth in North America in 1858, it was almost assuredly a herd animal, its main protection from predators being the sheer numbers of a herd that could potentially number in the hundreds, a dangerous enemy for a single Tyrannosaur or even a Pack of Raptors to take on, as they likely had a fee sentries in the herd who’s main priority while the rest to the herd grazed or slept would be to watch for predators or other dangerous.
And while they may have no physical ways to defend against large predators such as T-Rex, these multi-ton animals were capable of maintaining their top speed far longer than that of a T-Rex, which ambushed at top speeda for likepy only a hundred maybe two hundred yards at max before having to slow down or stop completely. In short, it is like a Lion hunting a Wildebeest. A noticeably weaker prey animal that is pretty difficult to take down.

And here, A pair of Hadrosaurus near the front of the herd stand up on their hindlegs to give them advantage in their sentry duty to make sure it is clear for the rest of the herd to continue on through the forest.