Pulido, F.; Widmer, M.: Are long-distance migrants constrained in their evolutionary response to environmental change? Causes of variation in the timing of autumn migration in a blackcap (S-atricapilla) and two garden warbler (Sylvia borin) populations. Annals of the New York Academy of Sciences 1046, pp. 228 - 241 (2005)
Widmer, M.; Biebach, H.: Changes in body condition from spring migration to reproduction in the garden warbler Sylvia borin: A comparison of a lowland and a mountain population. Ardea 89 (1), pp. 57 - 68 (2001)
Widmer, M.: Altitudinal variation of phenology and reproductive traits of the garden warbler (Sylvia borin). Biologia e Conservazione della Fauna 102, pp. 128 - 134 (1999)
Widmer, M.: Altitudinal variation of phenology and reproductive traits of the Garden Warbler (Sylvia borin). Biologia e Conservazione della Fauna 102, pp. 128 - 134 (1998)
Widmer, M.: Phänologie, Siedlungsdichte und Populationsökologie der Gartengrasmücke Sylvia borin in einem subalpinen Habitat der Zentralalpen. Journal für Ornithologie 137 (4), pp. 479 - 501 (1996)
Why do primates have big brains? In the Panamanian rainforest, scientists pitted large-brained primates against smaller-brained mammals to find out who was the smartest forager
The first narrative nonfiction book about the pioneering animal tracking project ICARUS, written by its founder Martin Wikelski, is published by Greystone Books