Release mode (sluitertijd) can be set to: Single shot, Continuous Low, Continuous High, Mirror Up, Timer, Quiet mode, etcetera.
Our default setting is Continuous High to be prepared for unexpected action of birds, hunting birds of prey or Cranes (Kraanvogels), Whooper Swans (Wilde zwanen) and the like flying by.
However we definitely use Quiet mode (Silent mode Z Series) in case of shy birds or late in the evening. Birds, particularly Owls, do have very sensitive hearings. Rarely we use Pinpoint Mode (Still Mode being prerequisite) in Z camera’s to focus on a bird wich is more or less in between branches, reed or other objects in the foreground.