frass

Frass in the oak leaf mine of a final instar larva of the moth Ectoedemia heckfordi

The frass of dampwood termites may be a useful sign of an infestation

Galleries of various species of wood-boring beetles typically are stuffed with frass

Typical frass dust from Bostrichid shot hole borer beetles

Typical sculpting of a frass pellet of a large caterpillar

A golden tortoise beetle larva carrying a mass of its own frass as a repugnatorial defence.

Frass refers loosely to the more or less solid excreta of insects, and to certain other related matter.