Assertion: owl's prey | /r/HasProperty | black-headed gull
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Source sentences:
text: Other large avian prey reported taken as adults by tawny owls (many of which approach or exceed the owls themselves in body mass) includes green-winged teal (Anas crecca), red grouse (Lagopus lagopus scotica), hazel grouse (Tetrastes bonasia), grey partridge (Perdix perdix), chukar (Alectoris chukar) common moorhen (Gallinula chloropus), Eurasian coot (Fulica atra), black-headed gull, black-legged kittiwake (Rissa tridactyla) and black woodpecker (Dryocopus martius).