
1) bird native to Australia 
Found on 
https://www.crosswordclues.com/clue/brolga

 The brolga (Grus rubicunda), formerly known as the native companion, is a bird in the crane family. It has also been given the name Australian crane, a term coined in 1865 by well-known ornithological artist John Gould in his Birds of Australia. The brolga is a common, gregarious wetland bird species of tropical and south-eastern Australia and New...
Found on 
http://en.wikipedia.org/wiki/Brolga
 [ship]
[ship]  Two ships of the Royal Australian Navy have been named Brolga, after the brolga. ...
Found on 
http://en.wikipedia.org/wiki/Brolga_(ship)

(from the article `gruiform`) ...With the possible exceptions of the sandhill crane (Grus canadensis), which descends on the grainfields of the Canadian prairies during the autumn ...
Found on 
http://www.britannica.com/eb/a-z/b/116

Australian native crane - elaborate courtship dance resemble 'quadrille', square
Found on 
https://mudcat.org/aussie/display_all.cfm

a large Australian crane, Grus rubicunda, with silvery-gray plumage and a red patch on the head, noted for its elaborate courtship dance. Also called
Found on 
https://www.infoplease.com/dictionary/brolga
  No exact match found.