ML31024711
Участник
Дата
Местоположение
- Возраст
- Не указано
- Пол
- Не указано
Примечания
(c) Narasimhan 2016
Подробности наблюдения
Description by Dipu Karuthedathu Bird flying across the boat fairly quickly (no sitting shots, could not track it further). The flight was slow and "heavy".The overall uniform dark plumage does not fit a Great/Chilean Skua, so the candidates boil down to Brown & South Polar Dark morph.The bird looks like just beginning its primary moult (P1-2 shed on June 26th), so fits a typical juvenile moult pattern. The pointed and worn outer primaries also appears good for a juvenile, so, this bird appears to be first cycle bird.The bill appear to be "slightly" dual-toned with a darker tip (as expected in juvenile/immature birds).The pale base to the primaries appear to be very small (again a juvenile feature).Underparts look very uniform, lacking mottling/streaks (typical of juveniles).Assuming this is a juvenile, some of the points which does not fit a "typical" SPSK juvenile may be.the uniform head, body and underwing coverts (SPSK juv generally show paler neck, some pale tones in the body/flanks etc.).No pale blaze at the base of the beak (which few SPSKs show, so absence is not definitive pointer, but just an additional observation).The underwing coverts appears to be uniform dark brown with no visible contrast between body and other feathers.The primary moult has started with just P1-2 dropped. [ South Polar Skuas typically show a much rapid start (with 3-4 dropped simultaneously) - Olsen & Larsson. (is this applicable for adults only or juveniles as well?) ]
Техническая информация
- Модель
- NIKON D750
- Lens
- 200.0-500.0 mm f/5.6
- ISO
- 200
- Фокусное расстояние
- 290 mm
- Вспышка
- Flash did not fire, auto
- Диафрагма
- f/5.6
- Выдержка
- 1/2500 sec
- Размеры
- 2048 pixels x 1534 pixels
- Исходный размер файла
- 1.02 MB