ML164328891
Western Flycatcher (Pacific-slope x Cordilleran Flycatcher) Empidonax difficilis difficilis x hellmayri
投稿者
日付
場所
- 年齢と性別
- 成鳥オス - X
- 音声
- さえずり
- プレイバック（音声の再生）
- プレイバック（音声誘引）不使用
視聴覚メディア・ノート
Poor photos of this bird: ML164478891
観察結果の詳細
Clear two-part position note on one. Song recorded on another. Also have poor photos. Confirmed as an intergrade by Andrew Rush at UC Berkeley who has studied the WEFL intergrade zone extensively, his thoughts: "The songs that you recorded are typical of intergrades. They appear more like Pacific-slope to me, but the peak frequencies are not as high and, e.g., the second song type in the typical sequence is more rounded. But, the second song type retains the break in the middle, which you really don’t find in pure Cordilleran populations. For pure Cordilleran, you are safest in southern Colorado and Utah and New Mexico, Arizona, and Texas. Otherwise, the populations tend to be at least partially intergrades (all the way to the Black Hills)."
テクニカル・インフォメーション
- レコーダー
- iPhone 8
- マイク
- アクセサリ
- オリジナルのファイルサイズ
- 8.65 MB