
1) bird native to Australia 2) Shrewd negotiator
Found on
https://www.crosswordclues.com/clue/hardhead

The hardhead (Aythya australis) (also white-eyed duck) is the only true diving duck found in Australia. Hardheads are common in the south-east of Australia, particularly in the Murray-Darling Basin, but also in the wetter country near the coasts. They are moderately nomadic in normal years, but disperse widely in times of drought. Significant numb...
Found on
http://en.wikipedia.org/wiki/Hardhead

• (n.) Block`s gurnard (Trigla gurnardus) of Europe. • (n.) The menhaden. See Menhaden. • (n.) The gray whale. • (n.) Clash or collision of heads in contest. • (n.) A coarse American commercial sponge (Spongia dura). • (n.) A California salmon; the steelhead.
Found on
http://thinkexist.com/dictionary/meaning/hardhead/
Hard'head` (-hĕd`)
noun 1. Clash or collision of heads in contest.
Dryden. 2. (Zoology) (a) The menhaden. See
Menhaden . [ Local, U. S.]
(b) Block's gurnard (
Trigla gurnardus ) of Europe.
(c) A California salmon; the steelh...
Found on
http://www.encyclo.co.uk/webster/H/13

USS Hardhead was an American Balao Class submarine of 1525 tons displacement launched in 1943. USS Hardhead was powered by diesel engines providing a top speed of 21 knots, carried a complement of 75 and was armed with one 4-inch gun, two 20 mm Oerlikon anti-aircraft guns; six 21 inch bow torpedo tubes and four 21 inch stern torpedo tubes.
Found on
http://www.probertencyclopaedia.com/browse/RH.HTM
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