Thomas Marent / Citrus Butterfly (Papilio demodocus) drinking minerals and salts from soil, Jozani National Park, Zanzibar, Tanzania

Ingo Arndt / Monarch (Danaus plexippus) butterflies gathering to drink water and take up minerals, Michoacan, Mexico

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

Murray Cooper / Tube-lipped Nectar Bat (Anoura fistulata), newly discovered species, feeding on sugar water, native to Andes

Luiz Claudio Marigo / Frilled Coquette (Lophornis magnificus) sipping nectar from a flowers of Lantana camara, Atlantic Rainforest, Itatiaia National Park, Itatiaia, Rio de Janeiro State, Southeastern Brazil

Eric Baccega / Red deer (Cervus elaphus) stag drinking, captive, Domaine de Sainte Croix, Rhodes, France, September.

Enrique Lopez-Tapia / A child drinking by wall with empty glass bottles, in the small village of Khumnu. Annapurna Sanctuary, central Nepal, November 2011.

Cyril Ruoso / Lyside Sulphur (Kricogonia lyside) butterflies gathering at salt deposits to drink minerals, southern Texas

Pete Oxford / Yellow-spotted Amazon River Turtle (Podocnemis unifilis) sunbathing surrounded by butterflies sipping salts from the turtle's tears, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Pierid Butterfly (Phoebis sp) group on mineral lick, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Pierid Butterfly (Phoebis sp) group on mineral lick, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Day-flying Moth (Urania leilus) group sipping minerals, Yasuni National Park, Amazon, Ecuador