ML164478891
Western Flycatcher (Pacific-slope x Cordilleran Flycatcher) Empidonax difficilis difficilis x hellmayri
- 性別與年齡
- 雄成鳥 - X
影音備註
Same individual singing at ML164328891.
觀察細節
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)."
技術資訊
- 型號
- Canon EOS 7D Mark II
- 鏡頭
- EF300mm f/4L IS USM
- ISO
- 400
- 焦距
- 300 mm
- 閃光
- Flash did not fire, auto
- 光圈值
- f/4.0
- 快門
- 1/250 sec
- 次方
- 1947 pixels x 1298 pixels
- 原始檔案大小
- 1.41 MB