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Yes even in that one we can see an orange lower mandible. I looked at the images on Macaulay. There were some which were similarly smoky to the op bird (I.e. cf +/-black as in yours). There were one or 2 like the one you posted with apparently darker bills. At the end of, I think that if this is dark pewee it can only be a young bird. I looked in Vallely/Dyer and Ridgeley but no mention of variant plumage