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 ...

In a welcome sign for conservationists and bird lovers, the skies of the North East of England have recently been graced by a series of rare and elusive bird sightings. From the booming call of the ...