ML646819256

觀察細節

An adult in non-breeding plumage found amongst the flock gulls that was roosting and preening on the gravel road between the east and south central ponds. Noted the following: an adult gull, slightly larger than nearby California Gulls but smaller than nearby Glaucous-winged Gulls; rounded head giving a "cute" expression rather than the "fierce" expression of the nearby California Gulls; heavily streaked head and neck; dark iris; more delicate bill compared to nearby GWGUs with a small red-spotted gonys but no other markings; pink legs; pale gray mantle and wing coverts; primaries with black limited to the upper side of the outer most primaries but grayish on the underside of the primaries (seen well when the bird briefly lifted its wings).

其他鳥種

• Glaucous-winged Gull Larus glaucescens
• Western Gull Larus occidentalis
• California Gull Larus californicus