Heather Angel / Caterpillar fungus (Ophiocordyceps sinensis), a rare traditional Chinese medicine sold to nourish yin and yang, for anti-aging and as natural viagra substitute- Dong Chong Xia Cho. Yunnan, China.

Andy Sands / Scarlet caterpillar club fungi (Cordyceps militaris) Excavated to show caterpillar with fungi fruiting from it, Buckinghamshire, England, UK, October. Focus Stacked Image

Andy Sands / Scarlet caterpillar club fungi (Cordyceps militaris) Excavated to show caterpillar with fungi fruiting from it, Buckinghamshire, England, UK, October. Focus Stacked Image

Adrian Davies / Scarlet caterpillarclub fungus (Cordyceps militaris / Ophiocordyceps sinensis). This species parasitises caterpillars. Sussex, England, UK. October.

Andy Sands / Scarlet caterpillar club fungi (Cordyceps militaris) found on grass at woodland edges this ascomycete parasitises its host a caterpillar or pupae and fruits from it, Buckinghamshire, England, UK, Octo...

Andy Sands / Scarlet caterpillar club fungus (Cordyceps militaris) found on grass at woodland edges, this ascomycete parasitises its host, a caterpillar or pupae, and fruits from it, Buckinghamshire, England, UK,...

Andy Sands / Scarlet caterpillar club fungi (Cordyceps militaris) found on grass at woodland edges this ascomycete parasitises its host, a caterpillar or pupa, and fruits from it, Buckinghamshire, England, UK, Oc...

Pete Oxford / Cofan wood lizard (Enyalioides cofanorum) Yasuni National Park, Amazon Rainforest, Ecuador, South America.

Adrian Davies / Scarlet caterpillar club (Cordyceps militaris) a parasitic fungus on the buried larvae of butterflies and moths. Sussex, England, UK, November.

Dong Lei / Caterpillar fungus (Ophiocordyceps sinensis) parasitizing body of caterpillar which is under the ground. Mount Namjagbarwa, Yarlung Zangbo Grand Canyon National Park, Tibet, China.

Dong Lei / Caterpillar fungus (Ophiocordyceps sinensis) held in human hand. This fungus parasitizes caterpillar under the ground and produces fruiting body above the ground. Mount Namjagbarwa, Yarlung Zangbo Gra...

Pete Oxford / Cordyceps Fungus attacking fly (Cordyceps sp) Yasuni National Park, Amazon Rainforest, Ecuador, South America.