干燥的河床上，一头食肉龙试图进攻一只甲龙，恐怕这只食肉龙选了一个难缠的对象，甲龙尾端武装了重锤，只要挨一下，食肉龙就会被打成重伤。左边的灵活的似鸟龙正在到处寻找小哺乳动物充饥。由于目前的冲突，一小群戟龙和一小群鸭嘴龙准备放弃这里可口的植物，它们已经走到了树林的边缘。 This image represents a 75-million-year-old scene from an area around what is now southeast Alberta, Canada. The focal point of this scene involves a confrontation in the middle of a dry stream bed in which an armored dinosaur, Euoplocephalus, tries to fend off the attack of a tyrannosaur, Albertosaurus, with its bony tail club. Keeping a wary eye on the fight is the ornithomimid Struthiomimus, content to try to find a spot to eat a recently caught meal consisting of a small mammal. On the far bank of the stream, small groups of the crested hadrosaur Corythosaurus and the spike-frilled ceratopsian Styracosaurus beat a hasty retreat from the conflict.(words from amnh.org)