Assertion: spruce grouse | /r/CapableOf | repel territorial intruders
Facets:
value: to maintain brood cohesion
type: PURPOSE
Source sentences:
text: Spruce grouse are among the most silent of all grouse, but they nevertheless have a number of calls used to warn of predators, to repel territorial intruders, to maintain brood cohesion, or to elicit brooding.