A coot is a water bird with black feathers and a white patch on its forehead.
coot in British English
(kuːt)
noun
1.
any aquatic bird of the genus Fulica, esp F. atra of Europe and Asia, having lobed toes, dark plumage, and a white bill with a frontal shield: family Rallidae (rails, crakes, etc)
2.
a foolish person, esp an old man (often in the phrase old coot)
Word origin
C14: probably from Low German; compare Dutch koet
coot in American English
(kut)
nounWord forms: pluralcoots or coot
1.
any of a genus (Fulica) of ducklike, freshwater birds of the rail family, with long-lobed toes