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.

《冰河世紀》第三部中另一個看點就是地獺母性大發，養了仨霸王龍寶寶，非常爆笑。印象中霸王龍是一種非常殘暴的恐龍，但近年來的新發現可能為之正名哦。

暴龍又名霸王龍，身長約13公尺，體重約7公噸，生存于距今約6850萬年到6550萬年的是白堊紀末期。暴龍是二足恐龍，擁有大型頭顱骨，并藉由長而重的尾巴來保持平衡。相對于它們大而強壯的后肢，暴龍的前肢非常小。長久以來，暴龍被認為只有兩根手指，但在2007年發現的一個完整的暴龍化石，顯示它們可能具有三根手指。暴龍的飲食習性現時不明：隨著科學家利用暴龍的骸骨來制作模型，以模擬它們的行為，實驗結果使他們認為暴龍其實應該是種食腐動物；另外，甚至亦有科學家指當時根本沒有足夠肉食以供暴龍食用，所以大多數時候它們都是吃素的。這些觀點互相矛盾，到現在還未有統一的結論。