Assertion: blue jay | /r/CapableOf | impersonate the calls of raptors
Facets:
value: occasionally
type: DEGREE
value: to test
type: PURPOSE
Source sentences:
text: It may occasionally impersonate the calls of raptors, especially those of the red-tailed and red-shouldered hawks, possibly to test if a hawk is in the vicinity, though also possibly to scare off other birds that may compete for food sources.