Whooper Swan song and calls

Birdsong and calls are often the easiest way to identify the Whooper Swan, especially when the bird is hidden in dense foliage. Below is what to listen for.

Song

Not a 'song' in the passerine sense, but a loud, resonant, bugle-like call. Often described as 'whoop-whoop-whoop' or 'klo-klo-klo', given both in flight and on the water. The call is distinctive and carries a long distance.

Calls

The primary call is a deep, resonant, trumpeting 'whoop' or 'honk'. They also produce softer murmurs and hisses, especially during courtship or when communicating with cygnets. Alarm calls are louder and more urgent versions of their trumpeting call.

When they vocalize

Vocalize frequently, especially when in flocks, during migration, and when disturbed. Calls are heard throughout the day and sometimes at night.

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