About cases of imitative predation of Black-headed Gulls on Starlings. - I.R. Merzlikin. - Berkut. 12 (1-2). 2003. - P. 8.
Observations were made in Tver region of Russia. A Hooded Crow took out fledglings from a starling-box. A Black-headed Gull from a flock in 5 birds has flown up to the nest and taken out a chick. [Russian].