Botaurus Stellaris
The Eurasian bittern or great bittern (Botaurus stellaris) is a wading bird in the bittern subfamily of the heron family Ardeidae.
The Eurasian or great bittern is 69–81 cm (27–32 in) in length, with a 100–130 cm (40–50 in) wingspan.
Critically endangered species in Croatia, nest numbers range between 40 - 70 pairs per year.