Thomas Marent / Crimson-patched Longwing (Heliconius erato) butterfly, Colombia

Ingo Arndt / Monarch (Danaus plexippus) butterfly feeding on nectar of Goldenrod during migration, East Coast, USA

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

Ingo Arndt / Blue Morpho (Morpho peleides) butterfly wing with false eyespots, Costa Rica

Ingo Arndt / Blue Morpho (Morpho peleides) caterpillar hatching out of egg, Costa Rica

Ingo Arndt / Blue Morpho (Morpho peleides) caterpillar hatching out of egg, Costa Rica

Ingo Arndt / Blue Morpho (Morpho peleides) butterfly egg, Costa Rica

Thomas Marent / Peacock Butterfly (Inachis io) on flowers, Switzerland

Thomas Marent / Silver-washed Fritillary (Argynnis paphia) butterfly, Switzerland

Thomas Marent / Glasswing Butterfly (Ithomania sp) pair, Tingomaria, Peru

Thomas Marent / Glasswing Butterfly (Ithomania sp), Tingomaria, Peru

Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, mass flying in wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico