Common or Eurasian Coot (Fulica atra), family Rallidae, order Gruiformes, found across much of Eurasia, northern Africa, and Oceania, Australia and New Zealand
The remarkable feet of coots are fissipalmate (lobed/partially webbed), which help them swim and walk across soft mud (without sinking).
Coots are not ducks, but are more closely related to rails and gallinules/swamphens (and more distantly, cranes).