The term "bird with hair on head" is a noun that describes a type of bird with a distinctive feature: feathers on its head that resemble hair. A prominent example is the crested seriema, a ground-dwelling bird native to South America known for its long, flowing head feathers.
These birds hold cultural and ecological significance. In some cultures, they are revered as symbols of wisdom and knowledge. Their unique head feathers provide camouflage and protection from predators, aiding their survival. Historically, the crest of the seriema has been used by indigenous tribes for ornamental purposes.