Nest build fresh nests daily out of leaves and other vegetation in which they sleep at night. They sometimes also build nests during the day for resting in. The smaller species of gorilla build their nests in trees, while the larger are confined to the ground. Nests of the western gorilla, the largest species, measure about in diameter. Some species of frog build nests ranging from simple to modest complexity. Many stream-dwelling frogs lay their eggs in a gelatinous mass which they attach to underwater vegetation. The jelly structure prevents the eggs from washing away. Fish engage in nest building activities
The Echo Nest an API used by over 7,000 developers to build independent music applications. The API was shut down on May 31, 2016 and developers were encouraged to use the Spotify API instead. The Echo Nest released data on 1 million songs for research purposes. The company was a co-organizer of Music Hack Day. In June 2011, the company released Echoprint, an open source and open data acoustic fingerprinting library. The data powered music solutions for customers such as MTV, Island Def Jam, BBC, MOG, Warner Music Group, eMusic, Spotify, Rdio, Clear Channel, VEVO, Nokia and Thumbplay. The Echo Nest was acquired