What are Relations between cassowary species?

Cassowaries belong to the family Casuariidae and consist of three species: the Southern cassowary, the Northern cassowary, and the extinct Emu-like cassowary. These species are closely related and share similar physical characteristics, such as their large size, striking blue and black plumage, and distinctive casque on their heads. They are primarily found in tropical forests of New Guinea, nearby islands, and northern Australia, and they exhibit similar ecological roles as seed dispersers in their habitats. Despite their similarities, they differ in size, habitat preferences, and some behavioral traits.