Assertion: martin's tail | /r/CapableOf | help their manoeuverability
Facets:
value: in pursuing aerial insects
type: TEMPORAL
Source sentences:
text: While the deeply forked tails may help their manoeuverability in pursuing aerial insects, in many species they are also used as a signal of male quality, those who can grow longer, and importantly symmetrical, streamers being the most favoured by the females.