Colaborador
Data
Localização
- Idade
- Não especificado
- Sexo
- Não especificado
Detalhes da observação
In this flock were a minimum of three Cackling Geese. Two birds were attached at the hip and traveling together. In a separate part of the flock was this lone Cackler. It was difficult to follow in the flock, easily lost for brief periods, due to its somewhat large size for a CACG and muted upperpart pattern. A closer look revealed a rounded crown with forehead sloping gently into a thick-based bill. This general head/bill shape held up throughout the observation and was not posture-dependent. Its cheek patch lacked the typical hutchinsii-like kink. This combination of features is classic for Taverner’s Goose (taverneri) and helps eliminate the expected Richardson’s form (hutchinsii). Possibly the first record of this taxon in RI? Being a pale-breasted bird, this may indicate that its origin is the Taverner's population from northern Alaska, based on current knowledge.
Informação técnica
- Modelo
- Canon EOS 7D Mark II
- Lente
- EF400mm f/5.6L USM
- ISO
- 250
- Distancia focal
- 400 mm
- Flash
- Flash did not fire, auto
- f-stop
- f/5.6
- Velocidade do obturador
- 1/1250 sec
- Dimensões
- 5472 pixels x 3648 pixels
- Tamanho do ficheiro original
- 701.74 KB