作为岛上最小的捕食者之一，美颌龙可以被看作是一个宠物，也可以被看作是害虫或者威胁。 当美颌龙单独行动时，它既不危险也不好战。但当它们成群行动时，它们就会回忆起自己的肉食本能。 当美颌龙的数量增长到一定数量时，它们的团队意识似乎会给它们“攻击”的勇气。 因为某些原因，美颌龙天性并不害怕人类。相反，它们似乎对人类和它们的生存攻击很感兴趣。它们很容易被好奇心驱使来接近人类，然后呼叫它们的族群来帮助探索它们的发现。而这也常常会导致上文所说的团队进攻。
Common name: Compy
Species: Compsognathus curiosicarius
Time: Late Jurassic
One of the smallest predators on the Island, Compsognathus curiosicarius can be seen as a pet, a pest, or a threat. While alone, Compsognathus is not dangerous or aggressive. In larger packs, however, it remembers its underlying carnivorous nature. After a group of Compsognathus grows to a certain size, their pack mentality always seems to embolden them to “attack.” For some reason, Compsognathus is not naturally afraid of humans. Rather, it seems to be quite curious about humans and their instruments of survival. They tend to be drawn toward humans out of this curiosity, and then call their pack mates to help explore their discovery. This usually leads to the aforementioned pack aggression, with dangerous results.
Compsognathus gain increasingly significant attack power and speed when in close proximity to other Compsognathus, as their pack aggression takes over their behavior. Additionally, their distress call carries quite far, rapidly alerting the tribe and its pets to danger more efficiently, and increasing the likelihood of forming a so-called "Compy Gang."