Assertion: billed gull | /r/HasProperty | observed
Facets:
value: despite having a similar call.:546 f1
type: OTHER
Source sentences:
text: Easily mistaken for the red-billed gull, the black-billed gull is distinguished by its black bill and is described as having a “more delicate appearance,” a “more buoyant and graceful” flight, and being “generally less noisy,” despite having a similar call.:546 F1 and F2 hybrids between the two gulls have been observed, both hybrids exhibiting dark red bills.:556