Abstract
Information on biometrics, weights, breeding and moulting seasons is presented for several passerines, namely Chaffinch, Fringilla coelebs moreletti, Azores Bullfinch, Pyrrhula murina, Goldcrest, Regulus regulus azoricus and Blackcap, Sylvia atricapilla atlantis, captured from mid to high altitudes in S. Miguel island, Azores. The Chaffinch is the only species presenting sexual dimorphism in bill measurements, the Azores Bullfinch and the Goldcrest are sexually dimorphic in wing‐length, while the Blackcap showed no sexual dimorphism. All species bred between June and August and started moulting in August. Predominantly granivorous birds seemed to start breeding slightly later than predominantly insectivorous birds.
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