Hanne & Jens Eriksen / Plain tiger butterfly (Danaus chrysippus) September, Oman

Jen Guyton / African monarch butterfly (Danaus chrysippus) sipping nectar from a Devil's thorn flower (Tribulus zeyheri) in the Kalahari Desert, South Africa.

Paul Harcourt Davies / Plain tiger butterfly (Danaus chrysippus) resting on grass stem at dawn, near Lago di Lesina, Gargano, Puglia, Italy. September.

Paul Harcourt Davies / Plain tiger butterfly (Danaus chrysippus) resting on seedhead at dusk, Lago di Lesina, Gargano, Puglia, Italy. September.