Pachycephalosaurs are famous for being hard headed. Maybe that’s why no one was surprised when large groups of these head-butting animals opted not to migrate south during the winter.

To be sure, winters in northern Minnesota aren’t nearly as extreme as they once were. But it’s not uncommon for temperatures to reach well below zero in January and February. The bigger herbivores can handle that better. Every spring, wildlife monitors find groups of Pachys that just didn’t make it.

By and large, though, the animals find a way to survive. Two pachycephalosaurs in particular, famous for their bright red markings (and affectionately known as “the Red Heads”), have become a welcome addition to some of the abandoned outer-ring suburbs. Generally, these red heads are pretty gentle. But everyone on the Extinction Coast knows you don’t want to get on the wrong side of a Pachycephalosaurus. They’re hard headed and they hold a grudge.

More About Pachycephalosaurus

Pachycephalosaurus was an herbivorous dinosaur that originally lived during the late Cretaceous. Because of the significant thickness of its bony skull, paleontologists have long theorized that this animal used its head as a battering ram–both for defense and for dominance. There’s also been some speculation that Pachycephalosaurs were omnivorous, thanks to some sharp teeth that have recently been discovered. 

The animal itself grew to be about 16 feet long, and may have weighed up to 2000lbs.

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