Oregon Redspots can have blue, yellow or black bellies.
I have seen blue and black bellied individuals within the same
population. Look at Alan ST. Johns book Reptiles of the Northwest.
He has several pictures of Oregon Redspots with blue bellies from
the heart of their range in Oregon. Oregon redspots are just
as aquatic if not more so than California redsided garters.
As far as their belly coloration showing up for fish that is
really unimportant since they usually sit on the bottom of the
waterbody and ambush prey or hunt in the shallows.
>>(or "Oregon" Concinnus vs "Cali" Concinnus if that indeed holds true)
>>
>>
>>Anyway, is the Cali red sided more aquatic than the oregon red spotteds? The reason I ask is because the blue belly would be harder for a fish etc to see from below than the black belly of an oregon red spotted.
>>
>>Ps- I know both locales can be variable but I haven't heard of any blue belly Oregons.
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>>"Nothing happens in contradiction to nature, only to what we know of it."