| Titre : | Social behaviour influences vulnerability of Jays (Garrulus glandarius) under attack by Sparrowhawks (Accipiter nisus) |
| Auteurs : | Helmut Steiner, Auteur |
| Type de document : | Article |
| Dans : | Vogelwarte (40(1-2) Oct., 1999) |
| Article en page(s) : | 138-139 |
| Langues: | Allemand |
| Résumé : | Two Jays were observed when beeing attacked by a Sparrowhawk (probably a male). While the Sparrowhawk grabbed the Jay several times on the ground, he was followed and attacked by the second Jay. The Sparrowhawk attack ended without success. During a second observation including a female Sparrowhawk and two Jays, the Jays did not help each other. Social behaviour is discussed as a factor influencing the vulnerability of a prey species. |



