Assertion: hummingbird | /r/HasProperty | depend on flower nectar
Facets:
value: to fuel hovering flight
type: PURPOSE
value: to fuel their high metabolisms
type: PURPOSE
Source sentences:
text: While all hummingbirds depend on flower nectar to fuel their high metabolisms and hovering flight, coordinated changes in flower and bill shape stimulated the formation of new species of hummingbirds and plants.