Individual wild wolves can be recognised by just their howls with 100% accuracy, a study has shown.
The team from Nottingham Trent University, UK, developed a computer program to analyse the vocal signatures of eastern grey wolves.
Wolves roam huge home ranges, making it difficult for conservationists to track them visually.
But the technology could provide a way for experts to monitor individual wolves by sound alone.
"Wolves howl a lot in the wild," said PhD student Holly Root-Gutteridge, who led the research.
"Now we can be sure... exactly which wolf it is that's howling."
The team's findings are published in the journal Bioacoustics.
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