Broody
/ˈbɹuːdi/
noun
A female bird in the condition to incubate eggs; a broody hen, duck, etc.
“There are six broodies in that coop.”
adjective
Of birds: sitting persistently and protectively on a nest, in order to hatch eggs.
“a broody hen”
Of any creature or person: showing an interest in raising young.
Synonyms: clucky