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Article
Volker Zahner, Auteur ; Robert Bauer, Auteur ; Thomas A. M. Kaphegyi, AuteurThe Black Woodpecker (Dryocopus martius) is described as a key creator of nesting cavities. Nevertheless, data on nest depredation at Black Woodpecker cavities are scarce. We continuously monitored 72 Black Woodpecker tree cavities by means of c[...]
Article
Volker Zahner, Auteur ; Harald Loy, AuteurIn 1998 a tree cavity nesting population of Swift (Apus apus) was rediscovered in the Spessart, an area of former occurrence. Potential breeding places of swift were mapped and showed a cavity density of 11 per ha. Over 75 % of all tree holes we[...]
