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
Cardiff City Stadium Cardiff City Stadium The Cardiff City Stadium () is a stadium in the Leckwith area of Cardiff, Wales. It is the home of Cardiff City Football Club and the Wales national football team. Following expansion of the Ninian Stand in July 2014, the stadium officially holds 33,280 supporters. The stadium replaced Ninian Park as Cardiff City's home ground in 2009, and is managed by Cardiff City Stadium Ltd., which is owned by Cardiff City Football Club Holdings Ltd. It also hosted the home matches of the Cardiff Blues rugby union team until the 2011–12 season, although originally the Blues had