Coot juvenile

The Eurasian coot is 36–38 cm (14–15 in) in length with a wing-span of 70–80 cm (28–31 in); males weigh around 890 g (31 oz) and females 750 g (26 oz).[9] It is largely black except for the white bill and frontal shield (which gives rise to the phrase "as bald as a coot", in use as early as 1430).[10] As a swimming species, the coot has partial webbing on its long strong toes. The sexes are similar in appearance.[11]
The juvenile is paler than the adult, has a whitish breast, and lacks the facial shield; the adult black plumage develops when about 3–4 months old, but the white shield is only fully developed at about one year old.
The Eurasian coot is a noisy bird with a wide repertoire of crackling, explosive, or trumpeting calls, often given at night.