Like other megafauna, Diprotodon left no fossils to prove its existence in northern Australia, but based on the variation in the isotope signatures of its incisors, researchers think they migrated.

与其他巨型动物一样， 双门齿兽没有留下任何化石来证明它在澳大利亚北部的存在，但根据其门齿同位素特征的变化，研究人员认为它们迁移了。

Based on a study of stable isotope signatures found in its teeth and bones, which can help tell us what an animal ate, it looks like Castoroides mostly ate freshwater plants, like water lilies, pondweeds, and sedges.

根据对其牙齿和骨骼中发现的稳定同位素特征的研究，这可以帮助我们了解动物吃什么，Castoroides 看起来主要吃淡水植物，如睡莲、池塘草和莎草。