 The larvae of one species, "Chrysomya rufifacies", have very distinct thorn-like processes covering its entire body, giving it the common name “hairy maggot blow fly”.The hairy appearance of "C. rufifacies" makes it easy to distinguish 2nd and 3rd instars from close relative, "Chrysomya megacephela".Although the 1st instars are fairly similar, "C. megacephela" are characterized by thicker spiracle hairs in the 2nd and 3rd instars.