Watching more than a dozen Griffon Vultures at at Parque Nacional de Monfragüe (Serradilla, Estremadura, Spain) on 30 May, this one leapt out at me as significantly darker than the Griffons, seen from the same angle in the same light. Of course, illusions are possible, but:
Do any features rule out Cinereous Vulture? Thank you!
Do any features rule out Cinereous Vulture? Thank you!