Kuika calls individually | Science

Kuuk-kukuuk-kukuuk… echoes from favorable lakes even in August evenings. The loons that succeeded in nesting there continue to defend their territory.

Most of the time, the human ear can’t distinguish what the lake’s pelicans are saying. However, you can recognize the performers if you measure the frequency of the sound, i.e. the pitch, in different phases of the scream. The individual features are preserved from year to year.

This is what Finnish researchers say Ornis Fennica -in leaf. They recorded territorial calls for four summers on the border of Central Finland and South Savo, Suonte, which is a barren and clear lake and protected because of its bird life. To protect the nesting peace of the swans, they always left the recording devices at the water’s edge in the early evening and only returned the next morning to pick them up.

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Kuikka is quite shy during the nesting season. Until now, researchers have had difficulty identifying individuals without disturbing them too much. You can’t see the ring from Kuika’s leg without catching a bird, and the individuality of the plumage can only be seen in close-ups. Now even dogs can be felt from a distance.

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Published in Science in Nature 5/2022.

Source: Tiede by www.tiede.fi.

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