Signal principle
Lessons from Ruffed Grouse
Drum from cover.
Wing-Drumming Display

Core lesson
Even a hidden life can send a message through the forest.
Biological basis
Male Ruffed Grouse produce a low drumming sound by rapidly beating their wings, usually from a log or display site, to advertise territory and attract mates.
Best use cases
Where this lesson tends to be most useful in practice.
SignalPresenceCourtshipTerritoryBeing heard without shouting