Tuesday, 31 March 2009
Black Woodpeckers can make some impressive holes when hacking into timber in search of invertebrates. Note that such holes are not nesting cavities. The round hole (with human hand for size comparision) does to a certain extent resemble a cavity entrance, but it is too large and too low on the tree. Note also the resin/sap that has streamed down the trunk from the holes. Photo taken in March 2009 in the Slovak Karst National Park, Slovakia.
Sunday, 29 March 2009
Wednesday, 18 March 2009
Monday, 16 March 2009
Some woodpeckers bore holes in telegraph poles. It is not clear why they do this as such poles are almost always devoid of invertebrate prey and seldom suitable as nesting-sites being exposed and often situated in busy places such as by roads. Perhaps woodpeckers simple "need" to excavate holes and in doing so in telegraph poles males advertise their presence and home-making skills to potential mates ?
Friday, 13 March 2009
Wednesday, 11 March 2009
Photo of an old feeding site of Black Woodpecker Dryocopus martius.Taken near Pavlov, Czech Republic. The adult man's hand provides a size comparison. Such long, slit-like holes are typically made by Black Woodpeckers when they are searching for tree-living carpenter ants in hollow trunks.