TIMMERMAN A (1991) Recent history: Lives of and for birds. LIMOSA 64 (3): 115-120.

In this paper, Arend Timmerman, Sr. describes his interest in natural history, especially birds, when adolescent, and his major activities in the course of his career as a professional ornithologist, 1945-80. In the latter capacity, he mainly studied waterfowl, particularly geese and swans and (conservation of) their haunts. He was an active member of IWRB's Goose and Swan Research Groups, and as such helped to realise, e.g., international counts of wintering geese (see Limosa 49, 1976: 230-292). Furthermore, he was the originator of a project for the re-introduction of the Raven in The Netherlands.

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