Bird - Black-headed Gull Appearance Adult with chocolate brown head in summer, white in winter, narrow white eye rings, deep red bill and legs, measures about 40cm.

• 成鸟头部的羽毛在夏季呈深啡色,冬季转为白色,有细长的白色眼眶,嘴及双脚深红色,身长约40厘米。