Imperial staircase to imperial staircases are more often of just two flights (hence the name) leaving the ground symmetrically to join one common destination. Occasionally, especially in the architecture of the Sicilian Baroque, they will leave the ground as one flight and then divide, but this is less common. One may also see an imperial staircase in the form of two flights rising to join and then continue as one flight, but this is rare. Imperial staircase An imperial staircase (sometimes erroneously known as a "double staircase") is the name given to a staircase with divided flights. Usually the first flight rises
Imperial pigeon the Australian pied imperial pigeon, the Torres Strait pigeon or the Torresian imperial pigeon. Imperial pigeons are only found in southern Asia, Australia, New Guinea and the Pacific, a distribution from the Himalayas ("D. badia") to Tahiti in the South Pacific ("D. aurorare"). The greatest diversity of birds is in New Guinea. Imperial pigeons are strong fliers, are capable of flight over oceans, and have been successful in colonising islands and archipelagos. Australia has a poor representation of "Ducula" amongst its fauna, with only one species breeding on the mainland ("D. spilorrhoa"). There is no clear explanation why more species