These larvae are used extensively as live food for terrarium pets and some pet birds, mostly due to their high fat content, their ease of breeding, and their ability to survive for weeks at low temperatures.

Waxworms are an ideal food for many insectivorous animals and plants.  Most commonly, they are used to feed reptiles, turtles or chameleons.

Waxworms are also occasionally used to feed certain kinds of fish in the wild, such as bluegills.  Waxworms may be store-bought or raised by anglers. 

Anglers and fishing bait shops often refer to the larvae as "waxies".