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
Pori Stadium Pori Stadium Pori Stadium () is a multi-purpose stadium in Pori, Finland. It is currently used primarily for football and stadium is the home of FC Jazz and NiceFutis. It is also the former home ground of FC PoPa. Pori Stadium is located at Isomäki sports center some two kilometres south of the city. Stadium is sometimes nicknamed as the "Stadium of Eternal Wind" due to windy conditions that are common on the stadium and its surroundings. By the main entrance is a javelin thrower statue by Finnish sculptor Kalervo Kallio which is inspired by Matti Järvinen's gold medal throw