Assertion: martin's nest | /r/HasProperty | 4 to 8 m2
Facets:
value: for the european subspecies
type: OTHER
value: in size
type: OTHER
Source sentences:
text: After building the nest, barn swallows may nest colonially where sufficient high-quality nest sites are available, and within a colony, each pair defends a territory around the nest which, for the European subspecies, is 4 to 8 m2 (43 to 86 sq ft) in size.