Assertion: bulbul's population | /r/CapableOf | show visible variations
Facets:
value: in bill morphology
type: OTHER
value: according to the food resources
type: OTHER
Source sentences:
text: Populations of the red-whiskered bulbul on the island of Reunion have diversified in the course of thirty years and show visible variations in bill morphology according to the food resources that they have adapted to utilize.