Assertion: arctic tern | /r/CapableOf | engage in kleptoparasitism
Facets:
value: occasionally
type: DEGREE
value: by swooping at birds
type: MANNER
Source sentences:
text: It is also thought that Arctic terns may, in spite of their small size, occasionally engage in kleptoparasitism by swooping at birds so as to startle them into releasing their catches.