Doug Wechsler / Cracker butterfly camouflaged on bark {Hamadryas sp} Costa Rica

Ingo Arndt / Cracker butterfly (Hamadryas feronia), Tropical America (Captive)

Ingo Arndt / Noble cracker butterfly (Hamadryas feronia), Central America (Captive)

Ingo Arndt / Noble cracker butterfly (Hamadyras feronia), close-up of head, Central America (Captive)

Ingo Arndt / Pupa of Noble Cracker butterfly (Hamadryas feronia) from Central America

Ingo Arndt / Noble cracker butterfly (Hamadryas feronia), antennae and back of head, Central America (Captive)

Claudio Contreras / Gray Cracker Butterfly (Hamadryas februa), Dzibilchaltun, Yucatan Peninsula, Mexico, August.

Claudio Contreras / Gray Cracker Butterfly (Hamadryas februa) on Heliconia sp. flower, Dzibilchaltun, Yucatan Peninsula, Mexico, August.

Claudio Contreras / Gray Cracker Butterfly (Hamadryas februa), Dzibilchaltun, Yucatan Peninsula, Mexico, August.

Claudio Contreras / Glaucous Cracker Butterfly (Hamadryas glauconome) Aldama, Tamaulipas, northeastern Mexico, August.

Will Watson / Azure cracker (Hamadryas arione ariensis) butterfly basking on tree branch, Lalo Loor Reserve, Manabi Province, Ecuador

Stephen Dalton / Red cracker butterfly (Hamadryas amphinome) on tree bark, captive, from central and south america

John Cancalosi / Grey cracker butterfly (Hamadryas februa) on Hecho Cactus (Pachycereus pectinaboriginum) Sonora, Mexico

John Cancalosi / Grey cracker butterfly (Hamadryas februa) on Hecho Cactus (Pachycereus pectinaboriginum) Sonora, Mexico

Thomas Marent / Variable Cracker (Hamadryas feronia) caterpillar in defensive posture, Colombia

Ingo Arndt / Variable Cracker (Hamadryas feronia) butterfly with coiled proboscis, South America

Thomas Marent / Red Cracker (Hamadryas amphinome), Tambopata-Candamo Nature Reserve, Peru

PREMAPHOTOS / Grey cracker butterfly (Hamadryas februa) camouflaged on bark in the campo cerrado, Brazil

PREMAPHOTOS / Cracker butterfly (Hamadryas feronia farinulenta) in a typical cryptic pose on a tree in tropical dry forest, Costa Rica

PREMAPHOTOS / Pale cracker butterfly (Hamadryas glauconome) on a tree in tropical dry forest, Costa Rica

PREMAPHOTOS / Azure cracker butterfly (Hamadryas arinome ariensis) on a tree in tropical dry forest, Costa Rica

Doug Wechsler / Cracker butterfly (Hamadryas sp) camouflaged on bark, Costa Rica

John Cancalosi / Clacker butterfly portrait {Hymadryas sp} tropical dry forest, Costa Rica

Michael & Patricia Fogden / Guatemalan Cracker (Hamadryas guatemalena) feeding on rotten figs on forest floor, rainforest, Costa Rica

Piotr Naskrecki / Gray Cracker (Hamadryas februa) butterfly, Monteverde Cloud Forest Reserve, Costa Rica

Agustin Esmoris / Epinome Cracker (Hamadryas epinome) butterfly, Argentina

Agustin Esmoris / Epinome Cracker (Hamadryas epinome) butterfly, Argentina

Thomas Marent / Brownish Cracker (Hamadryas iphthime) butterfly, Los Llanos, Colombia