ML539344231
Участник
Дата
Местоположение
- Возраст
- Не указано
- Пол
- Не указано
Подробности наблюдения
A lifer for us, this is an adult, probably a male. Note its thicker bill and bulkier shoulders compared to the similar Shiny Cowbird. Like other cowbirds, Screaming Cowbird is an obligate brood parasite, but unlike other cowbirds it lays its eggs only in the nest of the Grayish Bay-wing (formerly Bay-winged Cowbird). Both the eggs and juvenile plumage of the two are almost identical. The theory was that these two species were closely related and the Baywing was basal to the other cowbirds, an example of a primitive non-parasitic cowbird. This theory offered a compelling "just so story" about the evolution of brood parasitism in cowbirds. However modern molecular analysis found the two are not closely related and the so-called Bay-winged Cowbird is not a Cowbird at all. It has now been moved to its own genus and rebranded with the English name "Grayish Baywing" or just "Baywing" to help make that point.
Техническая информация
- Модель
- Canon PowerShot SX70 HS
- ISO
- 100
- Фокусное расстояние
- 247 mm
- Вспышка
- Flash did not fire
- Диафрагма
- f/6.5
- Выдержка
- 1/500 sec
- Размеры
- 1024 pixels x 887 pixels
- Исходный размер файла
- 166.07 KB