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Communal Roost #1

Деталі спостереження

There are four traditional communal roosts at Garden of the Gods, used by migrant swifts. This one is on the west side of the northwest face of South Gateway Rock. My estimate of 140 individual birds is conservative. This is just a small part of the larger group exploring the roost before making an entrance. The entry process to get all the swifts into this communal roost takes at least 15 minutes. A large group flies overhead before this time, the swifts circling and passing low over the roost location from time to time.

Технічна інформація

Модель

Canon EOS 7D

ISO

400

Фокусна відстань

420 mm

Спалах

Flash did not fire, auto

f-stop

f/5.6

Витримка

1/2000 sec

Розміри

1050 pixels x 824 pixels

Розмір вихідного файлу

352.58 KB