Een andere vorm van ‘echt’ zon-gedrag bij de Wespendief Pernis apivorus?

The most common form of sunning in Honey Buzzards is the delta-wing posture (Bijlsma 1997). The spread-wing posture is used while drying the wings after a bath or rainfall. However, a case of spread-wing posture, performed by a recently fledged juvenile on a sunny day, was described in the Dutch literature. In this case, it was obvious that the bird had not bathed. It reacted by turning its back towards the sun when the latter broke through the clouds (Tiele 1947).