Alex Hyde / Blue Doctor butterfly (Rhetus periander) drinking salts from mineral-rich river clay, a behaviour know as 'puddling'. On the banks of the Manu River, Manu Biosphere Reserve, Amazonia, Peru. No...

Alex Hyde / Blue Doctor butterfly (Rhetus periander) drinking salts from mineral-rich river clay, a behaviour know as 'puddling'. On the banks of the Manu River, Manu Biosphere Reserve, Amazonia, Peru. No...

Konrad Wothe / Butterfly (Rhetus periander) Panguana Reserve, Huanuca province, Amazon basin, Peru.

Luiz Claudio Marigo / Periander metalmark / Periander swordtail butterfly (Rhetus periander) sucking water with mineral salts from the ground on the margin of Cristalino River, Alta Floresta, Mato Grosso State, Brazil.

Thomas Marent / Jewelmark (Rhetus periander) butterfly, Rio Claro Nature Reserve, Colombia