Day July 19, 2021

How a butterfly tree becomes a web

IMAGE: Gene flow between species is indicated with dotted blue lines. Below: Butterflies of two different species (Heliconius cydno chioneus and H. melpomene rosina) mating on a Psychotria poeppigiana flower in… view more  Credit: Image by Krzysztof Kozak and Jorge Aleman.…