Bird
Many species of birds are eaten by humans. Domesticated and undomesticated birds are sources of eggs, meat and feathers.  In English, domesticated birds are often called poultry and undomesticated birds are called game birds. Songbirds, parrots and other types of birds are popular as pets. Guano is bird manure. It  is harvested for use as a fertiliser. Birds figure throughout human culture. About 120–130 species of birds have become extinct because of human activity since the 17th century.  Many more species had become extinct before then. Human activity threatens about 1,200 bird species with extinction, Things are being done to protect them. Recreational bird-watching is an important part of the ecotourism industry.