- California Gull (2 adults). Marshall County, Kentucky. 01 March 2019.
- Kamchatka Gull (adult). New Haven County, Connecticut. 02 March 2019.
- Kumlien's Gull (1st cycle). Kootenai County, Idaho. 02 March 2019.
- Glaucous-winged Gull (1st cycle). Pueblo County, Colorado. 06 March 2019.
- Slaty-backed Gull (1st cycle). San Joaquin County, California. 09 March 2019.
- Western Gull (1st cycle). Dallas County, Texas. 09 March 2019.
- Continuing from previous month.
- California Gull (1st cycle). Volusia County, Florida. 14 March 2019.
- Slaty-backed Gull (adult type). Monterey County, California. 14 March 2019.
- Mew Gull (adult type). Bernalillo County, New Mexico. 15 March 2019.
- Little Gull (1st cycle). Allegan County, Michigan. 17 March 2019.
- California Gull (adult type). Franklin County, Massachusetts. 19 March 2019.
- 5th State Record. 1st noncoastal occurence.
- Great Black-backed Gull (adult). Harrison County, Mississippi. 20 March 2019.
- California Gull (adult type). Middlesex County, New Jersey. 24 March 2019.
- 5th State Record. 1st County Record. Apparently the same individual sighted in MA the previous week.
- Slaty-backed Gull (1st cycle). San Joaquin County, California. 24 March 2019.
- Thayer's Gull (2nd cycle). Middlesex County, New Jersey. 25 March 2019.
- Lesser Black-backed Gull (3rd cycle). Monterey County, California. 27 March 2019.
- Kumlien's Gull (adult). Nanaimo District County, British Columbia. 28 March 2019.
Notes:
1. The California Gull observed in MA and NJ displayed an interesting wingtip pattern that may be considered atypical for the species. In particular, the primary pattern lacks a mirror on p9, something unexpected on adults. Although expected on some 3rd cycle types, the Atlantic bird appears to be a definitive adult.