A.B. Duncan

Articles by this author

A.B. Duncan

Some Local Bird Problems

Ornithology

TDGNHAS Series III, 21 (1936-38), 27(WARNING very large file size: 68.9 MB)

Abstract

27th November, 1936.
Mr Duncan spoke interestingly and informatively on the problems of bird watching, ringing, etc., and on many features of migration and bird-song, also on secondary sexual charcteristics and protective colouring. Mr Duncan submitted f

A.B. Duncan

Changes in the Abundance of British Birds [Summary only]

Ornithology

TDGNHAS Series III, 23 (1940-44), 135(WARNING very large file size: 40.26 MB)

Abstract

The lecturer spoke of the Grey-backed Crow, the Chough, the House-sparrow, Corncrake, Starling, Rook, etc. Various causes had been suggested but in most cases there was little definite knowledge. There was still an almost complete absence of vital statist