1. Raven is a large passerine crow with a black body, commonly known as fat-headed bird. It is the largest bird in passeriformes, with 12 subspecies. The whole body is black, with purple-blue metallic luster; Especially the two wings are the most significant. The feathers on the throat and chest are long and lanceolate; The nose must be long and developed, covering almost half of the mouth. The iris is dark brown; The mouth, tarsometatarsal bones and toes are black. Strong clustering, often nesting in groups, wandering in autumn and winter. Complex behavior, showing strong intelligence and social activity ability. The singing is simple and rude. Habitat in alpine meadows and mountain forest margins. Omnivorous, mainly feeding on small rodents, small birds, reptiles, insects and carrion. And eat the fruits of plants and even the leftovers of human activities. Distributed in the northern hemisphere. It is the national bird of Bhutan.
Crows are commonly known as "old man", "old crow" and grey magpie. Birds, Ravidae. The whole body or most of the feathers are black, hence the name. Build a nest in a tree. Often flying around in droves, singing and hoarse. Omnivorous cereals, insects, etc. The advantages outweigh the disadvantages and belong to the beneficial bird.