ML41667671
Iceland Gull (Thayer's x Iceland) Larus glaucoides thayeri x glaucoides/kumlieni
Contribuidor
Peder Svingen Mídias deste contribuidor Perfil
Data
Local
Duluth--Canal Park
St. Louis, Minnesota, United States
Mídias desta localidade Lista Ilustrada- Idade
- Não especificado
- Sexo
- Não especificado
Comentários
Thayer's–Iceland intergrade (lower left) shown here in comparison to two adult American Herring Gulls.
Detalhes da observação
Adult Thayer’s Gull X Kumlien’s [Iceland] Gull at Canal Park, Duluth, Minnesota, 24 Nov 2016. At first glance, the reduced amount of pigment in the wingtip (tiny mark on outer web of p6 and no markings on p5) and less-than-true-black markings on p7-10, suggest Kumlien’s Gull. However, the white mirror on p10 is not terminal, and the white tongue-mirror on p9 does not extend completely across p9 to join the p10 mirror. Up to 20% of the Kumlien’s-type gulls of all ages that we image in the Duluth-Superior area prove to be intergrades.
Informação técnica
- Modelo
- Canon EOS 7D
- Lente
- EF500mm f/4L IS USM
- ISO
- 800
- Distância focal
- 500 mm
- Flash
- Flash did not fire, auto
- f-stop
- f/5.0
- Velocidade do obturador
- 1/400 sec
- Dimensões
- 3405 pixels x 2432 pixels
- Tamanho original do arquivo
- 6.3 MB