Sightings:
- Slaty-backed Gull (adult). Toronto County, Ontario. 01 February 2021.
- Western Gull (adult). Davis County, Utah. 02 February 2021.
- Black-legged Kittiwake (1st cycle). Lake County, Illinois. 03 February 2021.
- Black-legged Kittiwake (1st cycle). Rankin County, Mississippi. 03 February 2021.
- Slaty-backed Gull (adult). Benton County, Washington. 03 February 2021.
- Franklin's Gull (1st cycle). Del Norte County, California. 05 February 2021.
- Mew Gull (adult). Suffolk County, New York. 06 February 2021.
- Slaty-backed Gull (adult). Kodiak Island County, Alaska. 07 February 2021.
- Kumlien's Gull (1st cycle). Monroe County, Indiana. 08 February 2021.
- Slaty-backed Gull (adult). Alameda County, California. 11 February 2021.
- California Gull (adult). Benton County, Tennessee. 12 February 2021.
- Slaty-backed Gull (adult). St. John's County, Newfoundland. 12 February 2021.
- Believed to be a returning bird.
- Heermann's Gull (2nd cycle). Chatham County, Georgia. 15 February 2021.
- 1ST STATE RECORD. Believed to be "the" roaming FL bird.
- California Gull (adult type). Middlesex County, New Jersey. 15 February 2021.
- Vega Gull (adult). San Mateo County, California. 15 February 2021.
- Slaty-backed Gull (adult). Labrador-Happy Valley-Goose Bay County, NL.
- 3rd record for Labrador.
- California Gull (adult). Sarasota County, Florida. 20 February 2021.
- Believed to be a returning bird.
- Vega Gull (adult). Santa Clara County, California. 21 February 2021.
- Laughing Gull (adult). McHenry County, Illinois. 24 February 2021.
- Black-headed Gull (1st cycle). Brevard County, Florida. 23 February 2021.
- Kamchatka Gull (adult). Nantucket County, Massachusetts. 25 February 2021.
- Laughing Gull (adult). Cook County, Illinois. 26 February 2021.