Trudy (voiced by Kathleen Barr) is a triceratops, a herbivore and the mother of Tank and Tuck who lives in Triceratops Trail Station with the rest of her herd. She is very worried of her families well being and always telling Tank to be polite or not to eat too fast. She is friends and knows Mrs. Pteranodon before she met her kids. She is good friends of the pteranodon family.