Berens von Rautenfeld D
Z Tierpsychol. 1978 Jun;47(2):180-1.
In the Biville chalk cliff area the Herring gulls nest both in slope and ground colonies and on cliff ledges. Like the Kittiwake (CULLEN 1957), the cliff-nesting pairs still accept other chicks after the 1st week of life. Gulls in slope and ground colonies, however, attack those chicks older than 4 days in close proximity to their nests (TINBERGEN 1936).
在比维尔白垩悬崖地区，银鸥在斜坡、地面聚居地以及悬崖壁架上筑巢。和三趾鸥一样（卡伦，1957年），在悬崖上筑巢的成对银鸥在雏鸟出生第一周后仍会接纳其他雏鸟。然而，在斜坡和地面聚居地的银鸥会攻击那些在其巢穴附近、日龄超过4天的雏鸟（廷贝亨，1936年）。
