FASA 365 Day 42, Nestor or Nesting Crane. Next time you walking along the riverside, look a little harder at that clump of weed and reeds along the riverbank.
Green and brown feathering that camouflages the bird well, add that to that that the muck and bilge gathers on them over time helps.
They grow to upwards of 6ft standing.
Flightless, and INCREDIBLY patient.