
1) Australian cockatoo 2) Endemic bird of Australia
Found on
https://www.crosswordclues.com/clue/galah

The galah ɑː, Eolophus roseicapilla, also known as the rose-breasted cockatoo, galah cockatoo, roseate cockatoo or pink and grey, is one of the most common and widespread cockatoos, and it can be found in open country in almost all parts of mainland Australia. It is endemic on the mainland and was introduced to Tasmania, where its distinctive pi...
Found on
http://en.wikipedia.org/wiki/Galah

blue-gray Australian cockatoo
Found on
http://phrontistery.info/g.html

(from the article `cockatoo`) The most widespread and numerous cockatoo species is the 35-cm (14-inch) galah (Eolophus roseicapillus). It is pink with gray wings and sweeps ...
Found on
http://www.britannica.com/eb/a-z/g/3

Noisy parrot, thus noisy idiot.
Found on
http://www.faqs.org/faqs/australian-faq/part5/

The galah (Kakatoe roseicapilla) is an Australian cockatoo. It has grey wings, back, and crest and a pink body.
Found on
http://www.probertencyclopaedia.com/browse/BG.HTM

Galah is Australian slang for a fool or simpleton.
Found on
http://www.probertencyclopaedia.com/browse/ZG.HTM

Noisy parrot, thus noisy idiot
Found on
https://mudcat.org/aussie/display_all.cfm

fool, silly person. Named after the bird of the same name because of its antics and the noise it makes.
Found on
https://www.koalanet.com.au/australian-slang.html
No exact match found.