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Article
Jolyon Troscianko, Auteur ; Lucas A. Bluff, Auteur ; Christian Rutz, AuteurWe report an observation of a wild New Caledonian Crow Corvus moneduloides manufacturing two tools from dry grass stems, and using them to extract lizards from the crevices of a fencepost. We recovered one of the tools and were able to examine t[...]
Article
Christian Rutz, AuteurThe Northern Goshawk Accipiter gentilis typically prefers woodland habitat for nesting and hunting. In recent decades, however, the species has started colonising urban environments across Europe. Here I present the first study on the ranging be[...]
Article
Christian Rutz, AuteurHamburg is one of the few cities with an urban population of Northern Goshawks. Breeding pairs use public parks, cemeteries, hospital grounds and private gardens for nesting. In 1997, both surviving juveniles (female, male) of one urban breeding[...]
