Monthly Notables September 2017
- Swallow-tailed Gull (adult). Snohomish County, Washington. 01 September 2017.
- Continued from 31 August 2017. Last seen at Point Wells on Sunday, 10 September.
- Little Gull (juvenile). Inyo County, California. 02 September 2017.
- Laughing Gull (juvenile). Taylor County, West Virginia. 02 September 2017.
- First sighting of the species in WV in nearly a decade.
- Sabine's Gull (juvenile). Fairfield County, Connecticut. 03 September 2017.
- Laughing Gull (juvenile). Les Basques County, Quebec. 04 September 2017.
- California Gull (adult). Denton County, Texas. 05 September 2017.
- Glaucous Gull (3rd cycle type). Kenosha County, Wisconsin. 07 September 2017.
- Franklin's Gull (adult). Hants County, Nova Scotia. 15 September 2017.
- Sabine's Gull (juvenile). District of Columbia County, DC. 04 September 2017.
- First record for Washington DC
- Lesser Black-backed Gull (adult). Teton County, Wyoming. 16 September 2017.
- Potential 1st record for Yellowstone NP and surrounding counties.
- Glaucous Gull (2nd cycle). Barnstable County, Massachusetts. 16 September 2017.
- First September record for MA.
- Iceland Gull (3rd cycle type). Suffolk County, New York. 16 September 2017.
- L.g. kumlieni. Likely summered in the region.
- Lesser Black-backed Gull (2nd cycle). Calgary County, Alberta. 16 September 2017.
- Great Black-backed Gull (adult). Keith County, Nebraska. 17 September 2017.
- Laughing Gull (juvenile). Kiowa County, Colorado. 19 September 2017.
- Black-legged Kittiwake (juvenile). Troup County, Georgia. 20 September 2017.
- Rare and unseasonal. Storm-driven?