Many thanks to Luis Mazariegos for his kindness in letting me use this beautiful picture of P. mixta being approached by the Andean sword-billed hummingbird, the marvellously named Ensifera ensifera. This photo was taken in the department of Tolima, Colombia, at an altitude around 2000 meters. The site is on a road from Ibague to el Cañon del Combeima heading to Nevado del Tolima. The photo is in his Hummingbirds of Colombia book.