ML194855951
Contribuidor
Fecha
Localidad
- Edad y sexo
- Inmaduro, sexo desconocido - 1
- Comportamientos
- Volando
Detalles de la observación
Small, strikingly black and white terns with small, fine, all black bills. The birds had much darker blackish grey upper surfaces on backs, wings, and tails that other more locally common small terns (Common and Arctic). On some of them, the upper surfaces were not uniformly coloured - they were patchy with darker patches, but all of the feathers on the mantles and wings were darker than those on Common and Arctic Terns. The birds were obviously small (appeared significantly smaller than Common and Arctic Terns) and flew very erratically, dipping and diving in the marsh and among the marsh vegetation. The birds had smudgy, darkish caps on the rear of their crowns and solid, dark marks extending down behind the eyes. They also had some dark smudgy markings extending down onto their flanks/side of their necks and one of them had a blotchy appearance underneath with lots of black feathers mixed in with the white ones on the breast/belly. Seen well from within 30 - 50 m as they foraged in the air overhead of us for several minutes. Photos attached.
Información técnica
- Model
- Canon EOS 80D
- Lens
- EF100-400mm f/4.5-5.6L IS II USM
- ISO
- 800
- Focal length
- 400 mm
- Flash
- Flash did not fire, auto
- f-stop
- f/8.0
- Shutter speed
- 1/1600 sec
- Dimensions
- 3576 pixels x 2384 pixels
- Original file size
- 9.01 MB