ML78241071

Age and sex

Adult, Unknown sex - X

Tags

Multiple species

Observation details

The photos (attached) of the bird at rest exhibit the following features (per Olsen and Larsson 2004) consistent with adult Slaty-backed Gull: • slaty-grey mantle, not as dark as that of GBBG; • marginally larger than nearby HERG; • stocky - deep-bodied, thick-necked, relatively short-winged; • fairly straight yellow bill with minimal gonys angle, red gonydeal spot; • dark streaking on upper breast, neck and head; • pale eyes, bright pink legs; • conspicuous white mirrors decreasing in size from P6-P10; • broad white scapular and tertial crescents connecting to narrow white secondary tips. Notably, Kirk Zufelt documented a SBGU at the nearby SSM landfill on Jan 12, 2012, two months later. Photos on Kirk's blog here: http://larusology.blogspot.ca/2012/01/slaty-backed-gull-sault-ste-marie.html. Same bird? Dec. 18/2017: Report submitted to the OBRC.

Technical information

Model

Canon PowerShot SX20 IS

ISO

320

Focal length

100 mm

Flash

Flash did not fire, auto

f-stop

f/5.7

Shutter speed

1/320 sec

Dimensions

4000 pixels x 3000 pixels

Original file size

1.76 MB