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[Tree-breeding Swift (Apus apus) and oak management in the Spessart Mountains, Germany]

Volker Zahner, Auteur ; Harald Loy, Auteur

Dans Ornithologischer Anzeiger (39(2-3) September, 2000)

In 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[...]

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