Bird nest July to September), it is not in others, and the swiftlets are declining in areas where the harvest reaches unsustainable levels. Some species of birds are also considered nuisances when they nest in the proximity of human habitations. Feral pigeons are often unwelcome and sometimes also considered as a health risk. The Beijing National Stadium, principal venue of the 2008 Summer Olympics, has been nicknamed "The Bird Nest" because of its architectural design, which its designers likened to a bird's woven nest. In the Victorian era, naturalists often collected bird's eggs and their nests. The study of bird nests is
Abovyan City Stadium Abovyan City Stadium Abovyan City Stadium () is an all-seater football stadium in Abovyan, Armenia. Abovyan City Stadium was opened in 1966 and currently holds a capacity of 3,946 seats. The stadium which was known as Kotayk Stadium until 2006, used to have a capacity of 5,500 spectators. In 2006, the venue was turned into an all-seater stadium, thus reducing the capacity down to 3,946 seats (2,498 at the eastern stand and 1,448 at the western stand). The stadium was renamed Abovyan City Stadium during the same year. The stadium used to be FC Kotayk Abovian's home ground during the