The birds of paradise commonly eat fruit and insects. Sometimes they eat nectar and small vertebrates. The birds that eat insects are called insectivores and the ones that eat fruit are called frugivores. The behavior of the bird depends on what they eat. The frugivores eat in the forest canopy and are friendly to other birds. The insectivores eat in lower parts of the tree and are more territorial. Even the insect eaters eat lot of fruits. All the birds are great seed dispersers.