Assertion: american crow's nest | /r/HasProperty | colonial
Facets:
value: always
type: DEGREE
Source sentences:
text: Nesting in a rookery is always colonial, usually in the very tops of large trees, often on the remnants of the previous year's nest.
text: The European pine marten (Martes martes) raids isolated nests in Sweden but is less successful when nests are part of a colony.