Threlfall W, Roy N A
Department of Biology, Memorial University of Newfoundland, St. John's, Canada.
J Wildl Dis. 1988 Jan;24(1):133-6. doi: 10.7589/0090-3558-24.1.133.
A skull deformity resulting in death of a herring gull chick (Larus argentatus) is described in detail. The bones of the skull and upper jaw were twisted, asymmetrical and of unusual size or absent. The lower jaw had an almost "spoon-like" external appearance and lacked normal articular surfaces.
详细描述了一只银鸥幼雏（Larus argentatus）因颅骨畸形致死的情况。颅骨和上颌骨扭曲、不对称，大小异常或缺失。下颌外观几乎呈“勺状”，且缺乏正常的关节面。
