Assertion: gull's head | /r/HasProperty | dark
Facets:
value: during the breeding season
type: TEMPORAL
Source sentences:
text: Black-headed gulls only have dark heads during the breeding season.
text: During the breeding season their heads are dark chocolate brown, and in the winter they are white with dark brown smudges on the side.
text: Of course, the ubiquitous Black-headed Gull isn’t the only gull to show a dark head during the breeding season and it is worth brushing up on your identification skills so you can pick out a Little Gull or Mediterranean Gull from the crowd.