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 Echo Nest a user. Taste Profiles are an amalgamation of taste clusters of genres and subgenres. Taste Profiles and clusters are not publicly available for individual users to access but have been released to journalists and researchers. One Echo Nest employee has created a categorical perception spectrum of genres and subgenres based on “an algorithmically-generated, readability-adjusted scatter-plot of the musical genre-space, based on data tracked and analyzed for 1461 genres by Spotify” called Every Noise At Once. The Echo Nest has also created an internal tool for Spotify and Echo Nest employees called The Truffle Pig, which is Spotify curates mood and