Male bitterns make the sound to establish territories and attract mates by opening and closing their bills, gulping air and inflating their esophagus.

The Eurasian bittern, a secretive British wetland bird, announces its presence with a distinctive low-frequency 'boom' during ...

The male bittern's booming mating call is evidence of the species' recovery in the UK Record numbers of bittern booming calls have been heard in Yorkshire during the bird's breeding season, the RSPB ...

For the first time in more than 40 years, the distinctive booming call of the endangered Australasian bittern once again rings out across the waters of Tasmania’s Lagoon of Islands. The Australasian ...

The "once heard, never forgotten" call of a rare bird has been heard at a nature reserve - just 15 minutes from Essex - for the very first time. RSPB Rainham Marshes, located beside the Thames, ...