Blue Bird

Blue bird is a harmless non-hostile creature that spawns above ground. It is the equivalent of the hen (Forest), the ice bird (Snow) and the flying octopus (Underground) in the Desert World, being the only source of eggs and feathers in this world.

Characteristics
Birds have no breeding system and will spawn randomly on the surface periodically to maintain a constant world population.

Birds will attempt to flee when attacked. They are quite fast and can be difficult for dwarfs to catch and kill; herd them into corners or holes for easier hunting. They are able to enter shelters through open doors and hatches and frequently fall down holes and mineshafts and are usually unable to find their way out.

It can be trapped and fenced in a farm.