ML610278709
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
Two diagnostic characteristics stand out…First the bill color and second the central tail feather. The bill color of the bird on the right is pinkish/orange. The bill color of the bird on the left is greenish/yellow. According to the Pyle’s report comparing Nazca versus Masked, the pinkish/orange bill is Nazca. “….. Two distinct bill-color patterns emerged as the birds aged from juvenile to definitive plumage. Birds with dusky, horn color (medium-pale brownish, often tinged mustard or olive), orange, and/or pink in the bill base commonly had brighter orange-yellow or golden yellow but not green in the bill tip. By contrast, birds with dark blue, green, and/or yellow in the bill base commonly had green and/or yellow but not orange in the bill tip, and the tip was less often brighter than the base. I propose that the first category represents Nazca Boobies and the second represents Masked Boobies.…” From ‘Ocean Birds of the World’ by Howell … Nazca has a white central tail feather; Masked does not. Please see the pictures below…
テクニカル・インフォメーション
- モデル
- Canon EOS 5D Mark IV
- レンズ
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 100
- 焦点距離
- 400 mm
- フラッシュ
- Flash did not fire
- Fストップ
- f/7.1
- シャッタースピード
- 1/500 sec
- 大きさ
- 646 pixels x 718 pixels
- オリジナルのファイルサイズ
- 111.67 KB