Assertion: wren | /r/CapableOf | detect changes of acoustic properties
Facets:
value: such as songs under foliage
type: LOCATION
value: within their territories
type: LOCATION
Source sentences:
text: In experiments involving playback, the wrens are capable of discriminating between degraded and undegraded songs, as well as degraded songs in the same acoustic conditions, and can detect changes of acoustic properties within their territories, such as songs under foliage.