What does "grey hen" mean?

A female of the black grouse, Lyrurus tetrix.

What is a synonym for "grey hen"?

Common synonyms include: gray hen, grayhen, greyhen, heath hen.

noun

noun ·Rare ·Advanced level

Noun

1
A female of the black grouse, Lyrurus tetrix.
"I heard a grey hen cackling among the ling[.]"
2
female black grouse wordnet
3
A large stone bottle for liquor. historical

"I heard a grey hen cackling among the ling[.]"