Blackcap (Sylvia atricapilla) Science Article 7
The extent of movements of male and female British blackcaps were analysed using ringing recovery records. Furthermore, through a literature review and the collection of original field data, the sex-ratios of blackcap samples taken at several latitudes in Europe and Africa were compared.
Paulo CATRY, Miguel LECOQ, Greg CONWAY, Marcial FELGUEIRAS, J. Michael B. KING and Salima HAMIDI, Ardeola, 53(1),june 2006, 31-38