- Glaucous Gull (2nd cycle). Glynn County, Georgia. 01 August 2020.
- Continuing from June 2020.
- Thayer's Gull (2nd cycle). Lorain County, Ohio. 02 August 2020.
- Laughing Gull (juvenile). Monroe County, New York. 03 August 2020.
- Franklin's Gull (adult type). Worcester County, Maryland. 03 August 2020.
- California Gull (2nd cycle). Sangamon County, Illinois. 04 August 2020.
- Continuing from July 2020.
- Franklin's Gull (adult). Essex County, Massachusetts. 04 August 2020.
- Lesser Black-backed Gull (3rd cycle). Portage la Prairie Area County, Manitoba. 07 August 2020.
- Franklin's Gull (adult). Kings County, Prince Edward Island. 08 August 2020.
- 2nd Province record, which comes less than two weeks after the 1st province record.
- California Gull (2nd cycle). Wagoner County, Oklahoma. 09 August 2020.
- Laughing Gull (adult type). Marin County, California. 15 August 2020.
- Great Black-backed Gull (2nd cycle). Cook County, Illinois. 18 August 2020.
- Lesser Black-backed Gull (2nd cycle). Capital District, British Columbia. 21 August 2020.
- 2nd Vancouver Island record.
- Little Gull (juvenile). Stark County, Ohio. 23 August 2020.
- Black-legged Kittiwake (juvenile). Erie County, New York. 25 August 2020.
- Lesser Black-backed Gull (2nd cycle). Central Okanagan District, British Columbia. 26 August 2020.
- Lesser Black-backed Gull (2nd cycle). Clallam County, Washington. 27 August 2020.
- 3rd County Record.
- Laughing Gull (juvenile). Niagara County, Ontario. 27 August 2020.
- Laughing Gull (juvenile). Erie County, New York. 27 August 2020.
- Same individual as Niagara County, Ontario.
- Sabine's Gull (2nd cycle type). Lake County, Tennessee. 27 August 2020.
- Slaty-backed Gull (adult). Anchorage County, Alaska. 26 August 2020.
- Slaty-backed Gull (3rd cycle). Kenai Peninsula County, Alaska. 27 August 2020.
- Little Gull (juvenile). Highland County, Ohio. 29 August 2020.
- Laughing Gull (2nd cycle). Eddy County, New Mexico. 29 August 2020.
- Heermann's Gull (1st cycle). Skagway-Hoonah-Angoon County, Alaska. 29 August 2020.
- Little Gull (juvenile). Kossouth County, Iowa. 30 August 2020
Notes:
- August saw countless reports of juvenile Heermann's Gulls all along the California, Oregon and Washington coast. The breeding season of 2020 proved to be a banner year with respect to breeding success, one that has not been witnessed for the last 3-4 years.