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 Burnside Nest The Burnside Nest The Burnside Nest was a temporary outdoor sculpture by Swedish artist Hannes Wingate, installed in Portland, Oregon, United States, in 2014. Hannes Wingate's "The Burnside Nest" was a temporary, "unsolicited" outdoor spherical sculpture resembling an oversized bird nest. It was installed in a tree on private property north of the east side of the Burnside Bridge, adjacent to the Burnside Skatepark near the intersection of Northeast 3rd Avenue and Couch Street. Wingate, who lives in Portland part-time, constructed the sculpture from branches found from the site and around the city. He also included man-made materials, similar to