ML161597401
Larus sp. Larus sp.
作者
日期
地点
- 年龄
- 未说明
- 性别
- 未说明
媒体文件注释
same two gulls, but now herring to left and unknown to right: shows size and height differential as discussed this entry as well as the browner cast to mantle of the unknown gull. note also the greater relative length and bulk for the bill of the unknown gull.
观察细节
one gull in a large group of herring gulls caught our attention. this bird had longer tibia than the herring gulls, perhaps longer tarsus too, so stood taller. bird is slightly bulkier than others in group. bird has brownish cast to mantle compared to adult plumaged herring gulls. eye appears pale as for other herring gulls. bill is fully dark tipped also suggesting some immaturity of a herring gull. this dark tip to bill is unlike the dark band slightly proximal to tip of a ring-billed gull which might be significantly smaller bird than this gull. this may be a typical herring gull not yet fully molted to final plumage, but it is just enough different to be noted here. see also further description at < https://ebird.org/view/checklist/S56933431 >
技术信息
- 原始文件大小
- 1.41 MB