מערכת יחסים: התאמה

Burbrink and Guiher (2014) synonymized the subspecies A. c. contortrix, mokasen, and phaeogaster (in part) into A. contortrix. These authors also split off A. laticinctus as valid species. However, laticinctus hybridizes over a broad area with A. contortrix. http://cnah.org/pdf/88290.pdf see comments here https://www.inaturalist.org/flags/258226