ML114441921
Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
作者
Alex Lamoreaux 该用户提供的媒体文件 档案
日期
地点
Shearwater Journeys_24/08/18_Leg 4/6
Monterey, California, United States
该地点产生的媒体文件 配图名录- 年龄和性别
- 成鸟,性别未知 - 1
- 行为
- 飞行
观察细节
Very early and unexpected. Identified in the field as a Herring (light mantle, light eye, pink legs, dark primaries), but reviewing downloaded photos revealed a very Thayer's-like (Iceland) primary pattern, both on the upperwing and underwing, which HERG x GWGU can also have. The wing pattern rules out a pure HERG. Brightening and saturating a closeup of the head (attached here) shows an orangish orbital ring - this should be red or purple (or inbetween) on ICGU, which is a more unlikely species in my opinion. Bill structure appears to fit better a hybrid better than ICGU, and overall size seemed fairly typical of HERG (and thus HERG x GWGU, which average larger than ICGU) compared to the WEGUs and CAGUs that were also in the chum line.
技术信息
- 型号
- Canon EOS 7D
- 镜头
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 400
- 焦距
- 248 mm
- 闪光
- Flash did not fire, auto
- 光圈
- f/5.6
- 快门速度
- 1/2000 sec
- 尺寸
- 4118 pixels x 2748 pixels
- 原始文件大小
- 2.54 MB