When they have young in the nest, you can hear the loud 'kee-kee-kee' cry of alarm as they speed in with food and suddenly see you watching them.
Times, Sunday Times
The trees are suddenly filled with loud, repeated 'hweet-tuc-tuc' cries of alarm.
Times, Sunday Times
The parents make wild cries of alarm if anyone comes near the chicks and tend them for a month, after which they can fly.
Times, Sunday Times