Individuals out in forest communicate through loud booming calls, which can be heard for miles.

They have a deep resonant booming call that may be heard at dawn and dusk.

Males court the females by strutting around them and giving booming calls.

It has a booming call which involves inflation of the red gular sac.

Like a booming call, the Duke's whisper sounded in the murk.

It was just an element of his surroundings, like the booming call from somewhere to the west.

The male periodically produces a resonant deep, booming call that may be heard for nearly 500m.

An even larger "eye" could hear the booming calls and muted, tinkling cadences of their conversations.

They watch a hand-reared male called Sirocco broadcast his nightly booming calls.

Lee's booming call spared Chloe from having to answer.