Butterfly vipers display sexual dimorphism as females are larger and males have more subcaudal scales.
Butterfly vipers display sexual dimorphism as females are usually the larger of the two monomorphic sexes.
Males, however, have a higher count of paired subcaudals, having 25-30 compared to the 16-19 on a female.
• Image | © Greg Hume, Some Rights Reserved (CC BY-SA 3.0)
• Sources | (Lipsett, 2003; Mallow, Ludwig, & Nilson, 2003; Mehrtens, 1987; Rogers, 2000; Spawls, Howell, Drewes, & Ashe, 2004; The Wikimedia Foundation, 2018)