Posts Tagged ‘vögel’


March 4th, 2011 1 comment

Walter de Back schrieb gerade über unsere Mailingliste:

Beautiful flocking display over the town of Utrecht. This is an annual event for these sparrows, that I had the privilege to witness many times.
If you look carefully, you may discern the hungry peregrine falcon — who may actually be the cause of the flocking behavior.