1. Description of the social behaviour of the magpie (Pica pica);Baeyens;Ardea,1979
2. Functional aspects of serial monogamy: the magpie pair-bond in relation to its territorial system;Baeyens;Ardea,1981
3. The role of the sexes in territory defense in the magpie (Pica pica);Beyens;Ardea,1981
4. Sociobiology of rape in mallards (Anas platyrhynchos): responses of the mated male;Barash;Science, N.Y.,1977
5. Breeding behavior of captive mallards;Barrett,1973