These nocturnal birds emit calls while flying and use the calls to navigate through trees and caves where they live.

These birds are noisy and emit an incessant sound that sounds like ta-rik-tik, hence the name.

Some birds will emit a distinctive 'hiss' when irritated, retreating or defending with pecking bites.

The bird emits loud calls which can be transcribed as kaaww and kreik-kreik.

She stood back, beaming proudly as the tiny clockwork bird stuck its head out and emitted several shrill Cuckoo!

The bird emitted a harsh, thrasher-like note and fluttered off.

The green bird emitted a faint chattering sound and clutched its way on to his waistcoat.

The birds flying alongside the Galileo emitted high-pitched cries and shrieks.

They made this discovery as they attempted to find out whether the birds emitted odors based on their social position in the local pecking order.

Anxious birds emit a harsh, shrit-it-it and nestlings call for food with a churring noise.