Jurong Bird Park can be seen here — the hyacinth, Lear's and Spix's. Houses five species of penguins within . Featuring a tall Portuguese galleon façade and designed to resemble a ship, the interior of Penguin Coast is constructed with timber beams and wooden flooring. Penguin Coast is home to the Humboldt, rockhopper, macaroni and king penguins, which live in an indoor, climate-controlled den with access to an outdoor enclosure showcasing African penguins, African darters and Hartlaub's gull. Asia's first nocturnal bird house featured a system of reverse lighting, converting day to night and vice versa. On display were 60 birds from 17
Bird vocalization and prevent an energetically costly fight . In birds with song repertoires, individuals may share the same song type and use these song types for more complex communication. Some birds will respond to a shared song type with a song-type match (i.e. with the same song type). This may be an aggressive signal, however results are mixed. Birds may also interact using repertoire-matches, wherein a bird responds with a song type that is in its rival's repertoire but is not the song that it is currently singing. This may be a less aggressive act than song-type matching. Communication through bird