Sage-Grouse Mating Rituals in Groups Called Leks

The mating rituals of the Greater Sage-Grouse.
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In the springtime, male greater sage-grouse (Centrocercus urophasianus) gather in groups, called leks, to compete for females. Males guard a territory a few meters in size (on average) and try to attract a mate by ruffling feathers and making a distinctive noise produced by air sacks in their chest.

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