Momma was a female Tyrannosaurus that took Sid the sloth away from his herd when he took her eggs from her.

Tyrannosaurus (meaning 'tyrant lizard') was a genus of theropod dinosaur. The species Tyrannosaurus rex ('rex' meaning 'king' in Latin), commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other tyrannosaurids. Fossils are found in a variety of rock formations dating to the last three million years of the Cretaceous Period, approximately 68 to 65 million years ago. It was among the last non-avian dinosaurs to exist prior to the Cretaceous–Tertiary extinction event.

《冰河世纪》第三部中另一个看点就是地獭母性大发，养了仨霸王龙宝宝，非常爆笑。印象中霸王龙是一种非常残暴的恐龙，但近年来的新发现可能为之正名哦。

暴龙又名霸王龙，身长约13公尺，体重约7公吨，生存于距今约6850万年到6550万年的是白垩纪末期。暴龙是二足恐龙，拥有大型头颅骨，并藉由长而重的尾巴来保持平衡。相对于它们大而强壮的后肢，暴龙的前肢非常小。长久以来，暴龙被认为只有两根手指，但在2007年发现的一个完整的暴龙化石，显示它们可能具有三根手指。暴龙的饮食习性现时不明：随着科学家利用暴龙的骸骨来制作模型，以模拟它们的行为，实验结果使他们认为暴龙其实应该是种食腐动物；另外，甚至亦有科学家指当时根本没有足够肉食以供暴龙食用，所以大多数时候它们都是吃素的。这些观点互相矛盾，到现在还未有统一的结论。