Where are koalas in the food chain?

The term "kangaroo" covers over 60 species of macropods, so it varies.

Most kangaroos are herbivores but all species have both natural and introduced predators. Dingoes and wedgetail eagles are predators of kangaroos. Introduced predators such as foxes, wild dogs and feral cats are a threat to joeys. Smaller kangaroos, such as wallabies, rat-kangaroos (not kangaroo rats), potoroos, pademelons and bettongs are preyed upon by quolls and pythons.

Smaller varieties of kangaroos such as the musky-rat kangaroo are omnivores, eating fruits, seeds, fungi insect larvae and small invertebrates such as grasshoppers and beetles, so they occupy a different position in the food dhain.