Silvester Diggles (24 January 1817 – 21 March 1880) was an Australian artist and musician of British origin, as well as being a noted amateur ornithologist and entomologist.

He and his niece Rowena Birkett produced some 325 hand-coloured plates of some 600 Australian birds for a work titled The Ornithology of Australia, of which three volumes were published from 1865 to 1870.

1863-1875, made up of four albums containing approximately 245 plates of watercolour drawings are digitised and held by the State Library of New South Wales.

He died at Kangaroo Point, Brisbane, survived by the two daughters of his first marriage and the two sons of his second and was buried in Toowong Cemetery.

[1][4] A book about Diggles' life, The Bird Man of Brisbane by Louis J. Pigott, was published in 2010 by Boolarong Press.