Assertion: black headed gull | /r/CapableOf | show dark head
Facets:
value: during the breeding season
type: TEMPORAL
Source sentences:
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.