Species added:
- Indian Peafowl added as a Code 3 species based on introduced populations found in Florida, California, and Hawaii.
- Great Black Hawk added as a Code 5 species based on records from South Padre Island, Texas in April 2018 and Biddleford, Maine in October 2018.
- Red-backed Shrike added as a Code 5 species based on a record from Gambell, Alaska in October 2017.
- Thick-Billed Warbler added as a Code 5 species based on a record from Gambell, Alaska in October 2017.
- River Warbler added as a Code 5 species based on a record from Gambell, Alaska in October 2017.
- European Robin added as a Code 5 species based on a record from North Wales, Pennsylvania in February 2015.
- Pied Wheatear added as a Code 5 species based on a record from Nome, Alaska in July 2017.
- Mistle Thrush added as a Code 5 species based on a record from Miramichi, New Brunswick in December 2017.
- Black-Backed Oriole added as a Code 5 species based on records from Reading, Pennsylvania in February 2017 and Sutton, Massachusetts in May 2018.
- Common Name of Gray Jay changed to Canada Jay as to not offend Canadians.