Assertion: penguin's bird | /r/CapableOf | replace their feathers
Facets:
value: gradually
type: MANNER
value: at a time
type: TEMPORAL
value: over the course of the year
type: TEMPORAL
Source sentences:
text: Most birds replace their feathers gradually over the course of the year, while penguins have to go through this process all at once.
text: Unlike most birds—which lose and replace a few feathers at a time—penguins molt all at once, spending two or three weeks land-bound as they undergo what is called the catastrophic molt.
text: Unlike flying birds, which moult and replace their feathers slowly so they can remain airborne, penguins moult all at once over a period of 2 – 5 weeks during the summer.
text: Unlike flying birds, which moult and replace their feathers gradually so that they can continue to fly, penguins moult all of their feathers at once.