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 hens is called a brood.
a group of Blackbirds is called a murder
A group of martens is called a "richness."
A group of grouse is called a "pack".
The -OH group is called the hydroxyl group
A group of sentences is called a paragraph
A group of cobras is called a quiver
A group of skunks is called a surfeit or a stench.
A group of swallows is called a "flight" or a "gulp."