They can be distinguished from other subspecies due to wide white bands, and frequent black tipping over the red bands. Also, the red in campbelli tends to be especially vibrant and bright compared to other subspecies. Non-morph Pueblan milk snakes always have pure white coloration on their light bands, save for some black speckling.
They can be identified from other subspecies by broad white stripes, and frequent black edges on red stripes. Additionally, the red in campbelli is notably vivid and bright compared to other subspecies. Non-morph Pueblan milk snakes always exhibit pure white bands with minimal black speckling.