Sightings:
- Kamchatka Gull (adult). Fairfield County, Connecticut. 01 March 2024.
- Last sighting of the winter season.
- Thayer's Gull (adult). Virginia Beach County, Virginia. 03 March 2024.
- Thayer's Gull (1st cycle). Cape May County, New Jersey. 04 March 2024.
- GRAY GULL* (3rd cycle type). Baldwin County, Alabama. 14 March 2024.
- Plumage sequence suggests same individual from Walton County, FL, last seen on 03 December 2023.
- Slaty-backed Gull (adult). Cowlitz County, Washington. 08 March 2024.
- Vega Gull (adult). San Mateo County, California. 10 March 2024.
- Slaty-backed Gull (adult). Multnomah County, Oregon. 11 March 2024.
- Same individual from Cowlitz County, WA; also seen in Clark on 12 March 2024.
- Ivory Gull (adult). North Slope Borough, Alaska. 11 March 2024.
- Little Gull (adult). Starr County, Texas. 17 March 2024.
- Common Gull (adult). Windham County, Connecticut. 20 March 2024.
- Great Black-backed Gull (1st cycle). North Okanagan District, British Columbia. 22 March 2024.
- Continuing since December 2023.
- Vega Gull (adult). Tompkins County, New York. 23 March 2024.
- Likely an individual first detected in this region in mid-December 2023.
- Slaty-backed Gull (adult). Anchorage Municipality, Alaska. 25 March 2024.
- Black-headed Gull (adult). Contra Costa County, California. 26 March 2024.
- Heermann's Gull (2nd cycle). Alberni-Clayoquot District, British Columbia. 26 March 2024.
Notes:
* The Florida-Alabama Gray Gull was relocated in Baldwin County, Alabama on 14 March 2024 and continues through 31 March 2024. It appears to be undergoing a 3rd prealternate molt with fresh scapulars and a paling gray head. It is safe to say this bird has adjusted to a boreal molt schedule and should be sporting an all-pale hood in the next few weeks.