Ernie Janes / Swallowtail butterfly (Papilio machaon) in garden, Norfolk, England, UK, June.

Juergen Freund / Cairns birdwing butterfly (Ornithoptera euphorion) on red tropical flowers, Queensland, Australia.

Alex Hyde / Apollo butterfly (Parnassius apollo) Nordtirol, Austrian Alps. June.

Tim Laman / Butterflies puddling, including Graphium sarpedon, Delias sp, and Graphium aristeus Vogelkop Peninsula, West Papua.

Paul D Stewart / Tiger complex mimics, (Heliconids), an old collection of butterflies in the famous 'tiger complex'. This is a group of around 200 species of mostly toxic South American species which share a similar p...

Konrad Wothe / Swallowtail butterfly (Papilio machaon) in flight, Upper Bavaria, Germany, August.