Een verrassing: broedt Havik Accipiter gentilis ei van Nijlgans Alopochen aegyptiacus uit?
De Takkeling , Volume 13 - Issue 1 p. 82- 83
During nest visits in the province of Friesland in 2004, a Goshawk nest was found to be occupied by an Egyptian Goose (clutch of 13 eggs). The Goshawk had built a new nest in the vicinity. When this latter nest was checked on 8 May, the brooding female left during the climb. The nest cup held a full Goshawk clutch and a recently hatched Egyptian Goose gosling. The latter jumped after the climber had started his descent. It is surmised that the Egyptian Goose had been chased away by the Northern Goshawk after having laid one egg; the Goshawk then produced its own clutch and incubated both its own and the goose’s egg. The final outcome of the gosling is not known.
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