There are many types of birds that are all black. Here are some possible birds:
1. Swallow: Swallow is a common small bird with black or dark blue feathers. Swallows mainly fly to hunt insects.
2. Crow: Crow is a medium-sized bird with black feathers. Crows are distributed all over the world and can adapt to different ecological environments.
3. Black Hawk: The Black Hawk is a large raptor with black feathers. It has excellent hunting ability and high flight speed and is widely used in hunting and falconry competitions.
4. Blackbird: The blackbird is a small bird with black feathers and a yellow bill. Blackbirds like to move in the woods and feed on fruits, insects, etc.
A more detailed description of the characteristics is needed to determine which species of bird it is.
