I've got two snakes that I'm not sure about the sex. One is Creek (who we're pretty sure is a Northwestern, despite his unique appearance). We've always assumed Creek is male, but now that he is older and growing (and no longer a picky eater) I'm not so sure.
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The second one is a Northwestern with pretty black belly scales. My husband wants to call it Mamba if it is a girl.
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The belly scales are very pretty:
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