Gregory Macalister Mathews ( 10 de septiembre de 1876 - 27 de marzo de 1949 ) fue un ornitólogoaustraliano.
Mathews hizo su fortuna en las porciones mineras, y se radicó en Inglaterra alrededor de 1900. Escribió The Birds of Australia, Los Pájaros de Australia (doce volúmenes, 1910-1927), asistido por Tom Iredale. Donó su biblioteca ornitológica a la Biblioteca Nacional de Australia en 1940.
1912. The Reference List of the Birds of Australia. Novitates Zoologicae, 18 de enero de 1912
1913. A List of the Birds of Australia. Witherby: Londres
1920. The Name List of the Birds of Australia
1921. A Manual of the Birds of Australia. Volume I: Orders Casuarii to Columbae. Witherby: Londres. Con Tom Iredale. Solo un volumen publicado de cuatro proyectados
1924. The Check-List of the Birds of Australia. Witherby: Londres. Comprende Suplements 1-3 de The Birds of Australia
1925. The Bibliography of the Birds of Australia. Witherby: Londres. Comprende Suplementos 4 y 5 de The Birds of Australia
1927. Systema Avium Australasianarum. a Systematic List of the Birds of the Australasian Region. BOU: Londres. 2 vols.
1928. The Birds of Norfolk and Lord Howe Islands and the Australian South Polar Quadrant. Witherby: Londrs
1931. A List of the Birds of Australasia, Including New Zealand, Lord Howe and Norfolk Islands, and the Australasian Antarctic Quadrant
1936. A Supplement to the Birds of Norfolk and Lord Howe Islands to which is Added those Birds of New Zealand not figured by Buller. Witherby: Londres
1942. Birds and Books: the Story of the Mathews Ornithological Library. Verity Hewitt Bookshop: Canberra
1943. Notes on the Order Procellariiformes. Con Edward Hallstrom
1946. A Working List of Australian Birds, including the Australian Quadrant and New Zealand. Shepherd Press: Sydney
libby Robin. 2001. The Flight of the Emu: a hundred years of Australian ornithology 1901-2001. Carlton, Vic. Melbourne University Press. ISBN 0-522-84987-3