Frankfurt-am-Main borough of Schwanheim, Germany: <b>Schwanheimer Alteichen</b> is the official name of a group of about 30, on average five centuries old oak trees (quercus) in the cityʼs municipal forest, <i>Frankfurter Stadtwald</i>. Until the 19th century, every autumn local farmers would have their herds of domestic pigs feed from the acorns.
<p>The coarse woody debris of the Old Oaks of Schwanheim hosts a number of rare species of wild animals; among them the lucanus cervus beetle, the common noctule, and the tawny owl.
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The photo shows debris of an exceptionally large Schwanheim oak tree; picture taken in April 2017.
<a href="//commons.wikimedia.org/wiki/User:Frank_Behnsen" title="User:Frank Behnsen">Frank Behnsen</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>