This website may help answer your question:
www.pitt.edu/~mcs2/herp/Lampropeltis.html

There are a number of larger types of milks (Andean, Ecuadoran and Hondurans) that get quite large. There are also a number of smaller types like Scarlet Kingsnakes (which are actually milk snakes), Louisiana Milksnakes and New Mexico Miks - which stay rather small. Part of the problem with most North American Milksnakes is that the babies are often too small to eat pinkies as hatchlings.

Tim

Third Eye

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