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 Peasant and the Nest Robber Immediately after his return from Italy, Bruegel showed no apparent interest in Italian figure types and compositions, reverting to the Antwerp tradition in which he had been trained. However, in these late works he shows that his study of Italian painting had taken root: these figures demonstrate his knowledge of Italian art and in particular the art of Michelangelo. This unusual subject apparently illustrates a Netherlandish proverb: "Dije den nest Weet dijen weeten, dijen Roft dij heeten" He who knows where the nest is, has the knowledge, he who robs, has the nest. The painting presents a moralising contrast between