ML41668061
Iceland Gull (Thayer's x Iceland) Larus glaucoides thayeri x glaucoides/kumlieni
Contributor
Peder Svingen Media from this contributor Profile
Date
Location
Duluth--Canal Park
St. Louis, Minnesota, United States
Media from this location Illustrated Checklist- Age and sex
- Adult, Unknown sex - X
Observation details
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.
Technical information
- Model
- Canon EOS 7D
- Lens
- EF500mm f/4L IS USM
- ISO
- 1000
- Focal length
- 500 mm
- Flash
- Flash did not fire, auto
- f-stop
- f/5.6
- Shutter speed
- 1/640 sec
- Dimensions
- 4382 pixels x 2921 pixels
- Original file size
- 8.29 MB