The color of the body feathers can be very eye-catching, such as the Xiantang gala finch, which has a black back and wings, and is in stark contrast to the green head, blue belly, turquoise throat and scarlet waist. Even so, some of the most colorful species are quite hidden in the dark forests or in the shade of tropical trees.
Species that prey on various surfaces coexist in the same area through different feeding methods. For example, some species forage in large patches of moss, some forage on the backs of branches, and some forage on the foliage; a few species such as the throng donch catch insects on the ground, while species such as the grey-headed donna finch join a mixed foraging group of small birds.
For example, the swallow-billed Donna finch is similar to other Donna finch in other aspects, the difference is that the beak of this species is wide and flattened, and the wing tip is like a swallow-like wing. Like other Donna finches, this bird predominantly eats fruit, but at the same time they hunt insects in the air like swallows—their wide mouths are a help.