William Hayes ( 1729 - 1799 ) was a British painter. William Hayes s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2066.69 USD for Portraits of the Curious Exotic Birds, which formerly composed the Osterly Menagerie, in 2004 to 23250.28 USD for The Portraits of British and Exotic Birds, coloured from nature, in 2004 , based on t