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
First ID’d by Glen S. We heard it calling and then it showed at the feeder. Yellow throat, black mask, lower white eye arc, streaky belly, long bill. FOY. Pics and audio. As per Aidan K: “This is a very tricky subspecies ID because one study has suggested that the described YTWA subspecies might not be valid due to overlap. However, for eBird purposes, it is not only acceptable, but useful to record a YTWA with a subspecies option, if a bird can be thoroughly documented as showing what we consider to be the field marks for the sub-taxon. In this case, the bird shows an extremely long and thick bill and clear yellow in the lores. This is typical for the Mid Atlantic/Southeastern ssp, dominica. The western-breeding birds (called alibilora) show shorter, narrower bills, and white lores with no more than a tiny touch of yellow. Despite the potential messiness, a Macaulay search will indeed reveal that most SE birds show long bills and yellow lores, and the opposite for birds in the western part of the species’ breeding range. There is certainly some merit to these marks, despite not holding up 100% according to the one study. Yellow-lored, long-billed YTWAs are much less frequent in CT than shorter-billed, white-lored birds, so this is notable.”
テクニカル・インフォメーション
- モデル
- DSC-RX10M4
- レンズ
- 8.8-220mm f/2.4-4.0
- ISO
- 100
- 焦点距離
- 220 mm
- フラッシュ
- Flash did not fire
- Fストップ
- f/4.0
- シャッタースピード
- 1/640 sec
- 大きさ
- 2731 pixels x 1821 pixels
- オリジナルのファイルサイズ
- 1.17 MB