ML66032631

Age and sex

Juvenile, Unknown sex - X

Observation details

I picked this bird out as we were waiting for the Ivory Gull to hopefully return after it left early in the morning. This was a 1st-cycle bird, still basically in juvenile plumage which is pretty typical for Thayer's. The very uniform plumage got my attention first, with the head and body being the same shade of light grayish-brown, with a light smudge around the eyes. The bill was smallish and all-black. The upperwing had the obvious striped look to the outer primaries with the dark outer and pale inner webs visible as it flew around several times, with all silvery underwing with dark only as a very narrow strip of the trailing edge of the outer primaries. At rest the obvious chevrons on the brown primaries were visible. We had the bird in view for over an hour, always right around the yellow barrier, before we lost it. Accepted by GA Bird Records Committee Several flight shots are in the same gallery as the Ivory Gull: http://www.pbase.com/mctodd/ga_ivory_and_thayers_gull

Technical information

Model

Canon EOS 50D

ISO

400

Focal length

400 mm

Flash

Flash did not fire, auto

f-stop

f/5.6

Shutter speed

1/2500 sec

Dimensions

1200 pixels x 800 pixels

Original file size

262.69 KB