Doris Longwing Butterfly, PeruThe one type of animal more conspicuous than any other in the Peruvian Amazon were the butterflies. They were everywhere in every possible color combination. This is a Doris longwing. They were active around the grounds of our lodge and kept me busy while waiting to go out on my next excursion. Doris longwings are particularly interesting scientifically because they exhibit polymorphism — which means within the same group of the same species living and mating in the same area, the traits of a gene can manifest in two or more different possibilities. In the case of the Doris longwing, they come in several different color combinations. Nikon D500 with Nikkor 500mm PF lens, ISO 800, f/5.6 at 1/160th of a second, Godox V860iii fill flash.