It has been bugging me for so long, I see 4 different patterned garters. But some in a certain area I find more than the others

From left to right we'll call them A, B and C


A and C - 80 out of 100 times I'll see this snake while B the rest of those times

D - use serpent for example, I only find maybe once a year


The red sided is obvious, but what about the other 3?

I don't want to be confused any longer