When he was posted to New Guinea from 1975 to 1978 he took the opportunity to make substantial ecological studies of birds there, resulting in the publication of numerous papers in the journal of the Royal Australasian Ornithologists Union, the Emu, and elsewhere.
A long-time member and benefactor of the Royal Australasian Ornithologists Union (RAOU), he was elected a Fellow of the RAOU in 1960.
This growing split between members' attitudes to bird-study came to a head at the 1935 campout at Marlo, eastern Victoria, when a museum ornithologist, George Mack, provocatively shot a Scarlet Robin at its nest, which had been under observation by the party.
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He is a member of the Royal Australasian Ornithologists Union (RAOU), and was elected a Fellow of the RAOU in 1990.
For the book The Lost World of the Moa (2002) he and Richard Holdaway received the D. L. Serventy Medal from the Royal Australasian Ornithologists Union in 2003 for an outstanding published work about Australasian avifauna.
From 1993, Baker-Gabb served as Director of the Royal Australasian Ornithologists Union, and during his term of office he established the Gluepot Reserve in South Australia.