Editing Beetle (section)

===Communication===
Beetles have a variety of ways to communicate, including the use of [[pheromone]]s. The [[mountain pine beetle]] emits a pheromone to attract other beetles to a tree. The mass of beetles are able to overcome the chemical defenses of the tree. After the tree's defenses have been exhausted, the beetles emit an anti-aggregation pheromone. This species can [[stridulate]] to communicate,<ref name="Beetle love">{{cite web|url=http://www.pc.gc.ca/eng/docs/v-g/dpp-mpb/sec2/dpp-mpb2b.aspx|title=Mountain Pine Beetle – Beetle Love|publisher=Parks Canada|access-date=March 13, 2011}}</ref> but others may use sound to defend themselves when attacked.<ref name="stridulation">{{cite journal|last= Meyer-Rochow| first= V.B.| title= Observations on stridulating Australian beetles (Hydrophilidae, Cerambycidae, Passalidae, Dynastinae) using scanning electron microscopical and electrophysiological techniques| journal=Forma et Functio | date=1971| volume= 4| pages= 326–339}}</ref>