- Ivory Gull (adult). Nome County, Alaska. 01 April 2017.
- Great Black-backed Gull (1st cycle). Larimer County, Colorado. 01 April 2017.
- Continued from March 2017.
- Black-headed Gull (1st cycle). Glynn County, Georgia. 04 April 2017.
- Laughing Gull (1st cycle). Monterey County, California. 05 April 2017.
- Sabine's Gull (adult type). Yolo County, California. 07 April 2017.
- Slaty-backed Gull (adult). Clatsop County, Oregon. 08 April 2017.
- Lesser Black-backed Gull (adult). Monterey County, California. 11 April 2017.
- 4th County record.
- Laughing Gull (adult type). Lincoln County, Oregon. 11 April 2017.
- 4th State Record.
- Franklin's Gull (adult). Kings County, Nova Scotia. 14 April 2017.
- Slaty-backed Gull (3rd cycle type). Muskegon County, Michigan. 19 April 2017.
- Michigan's 3rd April record of Slaty-backed Gull. A photo from the Thunder Bay CBC in early January (2017) suggests this may be the same individual, found some 400 miles to the southeast.
- Lesser Black-backed Gull (adult type). Socorro County, New Mexico. 29 April 2017.
Notes
- Worthy of mention is what appears to have been a "surge" in Lesser Black-backed Gull sightings on the Central California coast this past season. Interestingly, this was also the case for Oregon where there were 3 coastal sightings (previous to this the state only had one coastal record).