- Slaty-backed Gull (3rd cycle). Douglas County, Wisconsin. 02 April 2020.
- Mew Gull (1st cycle). Nueces County, Texas. 03 April 2020.
- Continuing from February 2020.
- Yellow-legged Gull (adult). St. John's County, Newfoundland. 07 April 2020.
- Black-headed Gull (adult). Chittenden County, Vermont. 07 April 2020.
- Black-headed Gull (adult). Ventura County, California. 07 April 2020.
- California Gull (subadult). Elkhart County, Indiana. 10 April 2020.
- Little Gull (adult). Prince William County, Virginia. 17 April 2020.
- Heermann's Gull (2nd cycle). Pima County, Arizona. 18 April 2020.
- Little Gull (adult). Elkhart County, Indiana. 20 April 2020.
- Laughing Gull (1st cycle). San Francisco County, California. 20 April 020.
- Apparent 4th record for San Francisco.
- Black-legged Kittiwake (1st cycle). Suffolk County, New York. 21 April 2020.
- Franklin's Gull (2 adults). San Mateo & San Francisco County, California. 24 April 2020.
- Franklin's Gull (adult). Mason County, West Virginia. 24 April 2020.
- Heermann's Gull (1st cycle). Duval County, Florida. 26 April 2020.
- 1st County Record. Roaming eastern Florida coast since August 2019.
- Black-legged Kittiwake (1st cycle). Racine County, Wisconsin. 27 April 2020.
- Black-tailed Gull (adult). Central Okanagan District, British Columbia. 30 April 2020.
01 May 2020
Monthly Notables April 2020
Sightings: