Cochineal (Dactylopius coccus) is a scale insect that lives on Opuntia cacti. The insect produces carminic acid, from which carmine dye is derived. The females and their nymphs secrete a waxy, white web to protect them from the sun and predators. Photo © Deborah Shaw, 2015.

Cochineal (Dactylopius coccus) is a scale insect that lives on Opuntia cacti. The insect produces carminic acid, from which carmine dye is derived. The females and their nymphs secrete a waxy, white web to protect them from the sun and predators. Photo © Deborah Shaw, 2015.

Cochineal (Dactylopius coccus) is a scale insect that lives on Opuntia cacti. The insect produces carminic acid, from which carmine dye is derived. The females and their nymphs secrete a waxy, white web to protect them from the sun and predators. Photo © Deborah Shaw, 2015.