Booming of male bitterns reveals presence of at least 164 of the heron-like waders living in British wetlands, says charity

Populations of the bittern, a wetland bird that was facing extinction in the UK in the late 1990s, are at a record high, conservationists report.

Resident numbers of “Britain’s loudest bird” increased in 2017, and experts – using the foghorn-like booming call of the males to survey the species – have counted at least 164 birds at 71 sites.

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