Assertion: hummingbird's migration | /r/HasProperty | time-coordinated
Facets:
value: with availability of insects as food
type: CAUSE
value: in spring
type: TEMPORAL
value: with flower and tree leaf emergence
type: OTHER
value: in early march
type: TEMPORAL
Source sentences:
text: The northward migration of rufous hummingbirds occurs along the Pacific flyway and may be time-coordinated with flower and tree leaf emergence in spring in early March, and also with availability of insects as food.