ML616866635
投稿者
日付
場所
- 年齢
- 指定なし
- 性別
- 指定なし
観察結果の詳細
**scarce but very regular in this context - SY individual; a rather small-billed bird for WESA but blocky-headed and dumpy-looking overall. Across multiple angles and feeding positions, this bird seemed more top-heavy and forward-leaning in posture. Also, note the contrast between the brownish coverts and scaps, and some replaced very pale-gray feathers more consistent with WESA than SESA. It should also be noted the regularity of WESA in this context (SY birds over-summering along the south shore inlets), in a phenomenon similar to certain species of rare shorebirds and terns that occur more regularly in this context. This is contrasted by the relative rarity of SY SESAs in this context - possibly attributed to their wintering ecology, ranging much further south in the winter and SY individuals only dispersing a shorter distance northward in summer (vs WESA wintering in the SE US and dispersing to the mid-Atlantic and NE US in summer).
テクニカル・インフォメーション
- 大きさ
- 1255 pixels x 828 pixels
- オリジナルのファイルサイズ
- 232.47 KB