Arnold Robert McGill OAM (1905–1988) was a Sydney-based Australian businessman and amateur ornithologist.
He was Assistant Editor of the RAOU journal, the Emu 1948-1969 and compiled indexes to it until his death.
He coauthored, with Keith Hindwood, The Birds of Sydney (1958).
He was a recipient of the Medal of the Order of Australia.
This article about an Australian ornithologist is a stub.