Taxinomically speaking a Milk Snake is a King Snake.
King snakes are lampropeltis ssp
Milks are lampropeltis triangulum ssp
Most milk have the typical "red on black, your OK Jack" pattern but some like the eastern and red milk are grayish with reddish blotches.
Most Kings are black and white (striped or speckled) but some are strait black and some are not at coloured like other kings. Gray-banded kings are just like the name suggests. There are also prairie and mole kings that are different. Prairies look a little like eastern milks. lots of other species I'm not familiar with
The scarlet king snake (lampropeltis triangulum elapsoides) is actually in the milksnake species.
I'm not exactly sure what makes L. triangulum what it is as the different ssp look quite different.
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