Sylvain Cordier / Monarch butterfly (Danaus plexippus) wintering in Oyamel pine forests (Abies religiosa) Monarch Butterfly Biosphere Reserve / Reserva de Biosfera de la Mariposa Monarca UNESCO World Heritage Site, An...

Konrad Wothe / Small Tortoiseshell (Aglais urticae) butterfly flying, Bavaria, Germany

Thomas Marent / Corinna Daggerwing (Marpesia corinna) butterfly, Santa Maria, Colombia

Thomas Marent / Cramer's Eighty-eight (Diaethria clymena) butterfly, Tatama National Park, Colombia

Thomas Marent / Tigerwing butterfly (Mechanitis sp.), two chrysalis, Ithomiini, Santa Maria, Boyacá, Colombia

Agustin Esmoris / Gulf Fritillary (Agraulis vanillae) butterfly on Zinnia (Zinnia sp) flower, Bahia Blanca, Argentina

Agustin Esmoris / Gulf Fritillary (Agraulis vanillae) butterfly on Zinnia (Zinnia sp) flower, Bahia Blanca, Argentina

Ingo Arndt / Brush footed butterfly caterpillar mimics snake {Archaeoprepona demophoon} Guanacaste, Costa Rica

Peter Schwarz/ BIA / Dryad (Minois dryas) butterfly, Poland

Lorraine Bennery / Knapweed fritillary butterflies (Melitaea phoebe) on Green winged orchid (Anacamptis morio), Grands Causses Regional Natural Park, France, May.

Pete Oxford / Rusty-tipped Page (Siproeta epaphus) chrysalis, Mashpi Rainforest Biodiversity Reserve, Pichincha, Ecuador, sequence 1 of 3

Peter Schwarz/ BIA / Small Tortoiseshell (Aglais urticae) butterfly, Hesse, Germany