Desert Rosy Boa vs. Coastal Rosy Boa
Split from one species in 2016; the Desert Rosy Boa is south of the Gila River, the Coastal Rosy Boa north and west of it (and in the Gila Mountains). A: Crisp, even edges in the Desert Rosy Boa; ragged, irregular edges in the Coastal Rosy Boa. B: Dark brown or chocolate, in strong contrast with the cream or grey ground in the Desert Rosy Boa; reddish, orange or brownish, in low contrast with the ground in the Coastal Rosy Boa. Stripe colour varies within each species; the range decides most snakes.
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