Hadrosaur

Hadrosaurs weren't loners. Evidence from massive "graveyards" and nesting sites suggests they lived in enormous herds and provided significant parental care to their young.

“Hadrosaurs don't get the love that they deserve! ... Everybody loves Theropods, because they were fearsome. ... But nobody cares about Hadrosaurs. They pejoratively call them the cows of the Mesozoic.” Reddit · r/RandomThoughts · 7 months ago hadrosaur

Paleontology fans and researchers often debate whether hadrosaurs get enough respect compared to their flashier carnivorous cousins. Hadrosaurs weren't loners