Common kingfisher

They are not songbirds.

An excerpt from the article 14 facts about common kingfisher

They use a few sharp sounds depending on the situation: the call for flight is a short, sharp whistle repeated two or three times, and distress is a sharp, penetrating sound. Hungry chicks calling for food make bubbling sounds.

During courtship, common kingfishers are particularly fond of calling, slightly changing their voices.