Though there is something almost magical about crossing paths with a butterfly, most people stop to enjoy the sight without giving the encounter much thought. Unfortunately, the long-term existence of ...

View Four works: A.) Study of two black and yellow butterflies, B.) Two butterflies on a flowering branch, C.) The evolution of the butterfly from cocoon to larva to butterfly, D.) A bee and a ...

From the black cocoons, ... The butterfly appears to be a hybrid between two known tiger swallowtail species — P. glaucus and P. canadensis — but because it lives in a range where neither ...