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
The Sex Nest standard than in most German sex fare" but noted that the film's humour was still "terribly heavy-handed and the film's two 'serious' sub-plots...are never successfully integrated into the comic narrative." The Sex Nest The Sex Nest () is a 1970 West German sex comedy directed by Alfred Vohrer. The film is about a brothel for neglected wives that is predominantly staffed by men. It is based on the novel by . The so-called yellow house Pinnasberg is a Hamburg brothel for women, which is, led by authoritarian "General" Werner Zibell, supported by its busy night porter. When one of his