Assertion: woodpecker's number | /r/CapableOf | decline since historic times
Facets:
value: probably
type: DEGREE
value: because of habitat degradation
type: CAUSE
Source sentences:
text: While Acorn Woodpeckers are common in oak woodlands, their numbers have probably declined since historic times because of development and habitat degradation, including overgrazing and loss of oaks due to disease and habitat conversion.