A group of capercaillies is called a "lek." During the breeding season, male capercaillies gather in these leks to display their courtship behaviors and attract females. The lekking behavior is characterized by males performing elaborate displays to establish dominance and attract mates.
From grouse-alike bird, common ancestor of ptarmigans, grouses and capercaillies.
A group of Dolphins are called a Pod
A group of dolphins is called a pod. If that is your question.
A group of shrews is called N.O.W.
a group of Blackbirds is called a murder
A group of hens is called a brood.
A group of martens is called a richness
A group of grouses is called a covey
A group of grapes is called a bunch of grapes.
A group of Spiders is called a cluster or clutter. Spiders belong to the group of animals called arachnids.
A group of swine is called a sounder or drift
The -OH group is called the hydroxyl group