Phil Savoie / European honey bee (Apis mellifera) worker at hive entrance emitting Nasonov pheromone from abdominal gland and fanning wings to spread the scent to returning workers, Monmouthshire, Wales, UK. Septem...

Milan Radisics / European beewolf (Philanthus triangulum) female grooming antennae. The antennae of these species has symbiotic bacteria living in the antennae gland. In females, these glands are involved in the prese...

Milan Radisics / European beewolf (Philanthus triangulum) grooming antennae. The antennae of these species has symbiotic bacteria living in the antennae gland. In females, these glands are involved in the preservation...

Jeff Foott / Lodgepole Pine (Pinus contorta) tree with pheromone packet to deter an attack from Mountain Pine Beetle (Dendroctonus ponderosae), Colorado

Andy Sands / Tanner beetle (Prionus coriarius) female on tree distributing pheromone to attract a male, Surrey, England, UK. August

Andy Sands / Tanner beetle (Prionus coriarius) female on tree distributing pheromone to attract a male, Surrey, England, UK. August

Thomas Marent / Atlas Moth (Attacus atlas) antennae of a male, Malaysia

Neil Aldridge / Vet working for the Endangered Wildlife Trust fastening a pheromone imbued calming collar around the neck of a tranquilized African wild dog (Lycaon pictus), these collars are designed to soothe dogs...

Neil Aldridge / Vet working for the Endangered Wildlife Trust placing a pheromone imbued calming collar around the neck of a tranquilized African wild dog (Lycaon pictus), these collars are designed to soothe dogs i...

Alex Hyde / Cockchafer Beetle (Melolontha melolontha) male antenna detail under scanning electron microscope. The surface is studded with sensory cells (yellow) with which it can detect the pheromone signals give...

Andy Sands / Comma butterfly (Polygonia c-album) at rest with wings closed on Hazel leaf showing comma shaped pheromone gland, Hertfordshire, UK, September

Christian Ziegler / King Spider Orchid (Caladenia pectinata) flower being visited by male parasitic wasp which is attracted to the flower by faux female wasp pheromone, western Australia

Nick Upton / Walled fields of Prickly pear / Barbary fig (Opuntia ficus-indica) on volcanic soil, formerly harvested for Cochineal insects (Dactylopius coccus), with Monte Corona volcanic peak in the background, n...

Nick Upton / Cochineal insect (Dactylopius coccus), dense colony of scale insects from which the red dye cochineal is extracted, on Prickly pear cactus / Barbary fig (Opuntia ficus-indica) leaf, Gran Canaria, Cana...

Adrian Davies / Cochineal insect (Dactylopius coccus) on Prickly pear cactus (Opuntia ficus indica) cultivated for the production of cochineal dye. Guatzia, Lanzarote, Canary Islands

Adrian Davies / Cochineal insect (Dactylopius coccus) on Prickly pear cactus (Opuntia ficus indica) cultivated for the production of cochineal dye. Guatzia, Lanzarote, Canary Islands

Adrian Davies / Cochineal insect (Dactylopius coccus) on Prickly pear cactus (Opuntia ficus indica) cultivated for the production of cochineal dye. Guatzia, Lanzarote, Canary Islands