Zeslegsel van Buizerd Buteo buteo bebroed door twee vrouwtjes

In March 1999, a nest of a Common Buzzard in southeastern Frisia contained 6 eggs, three of which mostly white, the other three with brown flecks. In April, two females were incubating side by side on this nest (but viewing opposite directions), one with a rather white plumage, the other dark brown. Three eggs hatched and fledged. This trio had been together since at least 7 years; both females raised nestlings in 1998 in separate nests.