ML618631429

Age

Not specified

Sex

Not specified

Observation details

Scope views as 2 small gulls with black heads, gray mantles and dark (black) underwings foraged near the opposite end of the lake moving north until I lost them as I attempted photos. I do not know of another gull or tern with dark underwings. Flew in a foraging pattern similar to a Bonaparte’s with frequent turns and dips into the water but not dives. I did see 8 terns on the water which I presume were Common Tern since they were reported earlier today, but I could not verify and separate it from Forster’s at that distance. There were also Bonaparte’s Gulls in the area which could be easily separated from the others with the white forewings. Distant photos attached which show the black head and black underwing on both sides but in different photos.

Technical information

Model

Canon EOS R7

Lens

RF100-400mm F5.6-8 IS USM + EXTENDER RF2x

ISO

2500

Focal length

800 mm

Flash

Flash did not fire

f-stop

f/16.0

Shutter speed

1/1000 sec

Dimensions

669 pixels x 446 pixels

Original file size

74.11 KB