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
Birds Nest (horse) Birds Nest (horse) Birds Nest (1970–1994) was a British-bred thoroughbred racehorse. In a long career as a specialist hurdler he ran six times in the Champion Hurdle at Cheltenham Racecourse, finishing second to Night Nurse in 1976 and third behind Sea Pigeon and Monksfield in 1980. He won 16 hurdle races including the Fighting Fifth Hurdle and the Bula Hurdle on three occasions each. He also won the Christmas Hurdle and two runnings of the Scottish Champion Hurdle, beating some of the best hurdlers of all time. He has been described as the best hurdler never to win the Champion