Juergen Freund / Timelapse of a Cairns birdwing (Ornithoptera euphorion) butterfly caterpillar metamorphosing into a chrysalis, Queensland, Australia, April.

Juergen Freund / Timelapse of a Cairns birdwing (Ornithoptera euphorion) butterfly caterpillar emerging from egg on an Dutchman's pipe (Aristolochia) leaf and feeding, Queensland, Australia, April.

Jose B. Ruiz / Birthwort / Dutchman's Pipe (Aristolochia sempervirens), Alcal de Guadara, Seville, Spain

Geoff Simpson / Dutchman's pipe{Hypopitys monotropa} Peak District NP, Derbyshire, UK - saprophytic plant lacking in chlorophyll

Heather Angel / Brazilian Dutchman's pipe flower (Aristolochia gigantea) with green inflated pouch. Flower smells of carrion to attract fly pollinators. Cultivated in glasshouse, Surrey, England, UK. Native to Br...

Heather Angel / Brazilian Dutchman's pipe flower (Aristolochia gigantea) with green inflated pouch. Flower smells of carrion to attract fly pollinators. Cultivated in glasshouse, Surrey, England, UK. Native to Br...

Eladio Fernandez / Dutchman's pipe (Aristolochia passiflorifolia) Camaguey, Cuba, July.

Jouan Rius / Gila woodpecker (Melanerpes uropygialis) female feeding on nectar in Saguaro cactus blossom (Carnegiea gigantea), Lost Dutchman State Park, Arizona, USA, April 2014.

Jouan Rius / Gila woodpecker (Melanerpes uropygialis) male feeding on nectar in Saguaro cactus blossom (Carnegiea gigantea), Lost Dutchman State Park, Arizona, USA, April 2013.

Jouan Rius / Curve-billed Thrasher (Toxostoma curvirostre) feeding on nectar in Saguaro cactus blossom (Carnegiea gigantea), Lost Dutchman State Park, Arizona, USA, April.

Jouan Rius / Superstition mountain and Teddy Bear cholla cactus (Opuntia bigelovii) at sunset, Lost Dutchman State Park, Arizona, USA, April.

Jouan Rius / Teddy Bear cholla cactus (Opuntia bigelovii) flowers, Lost Dutchman State Park, Arizona, USA. April.