By Helen BriggsBBC News
12 March 2016
Urgent action is needed to stop the Balearic sheerwater being drowned in fishing lines and nets, say scientists.
The bird breeds in the
Islands, sometimes stopping off in British waters as it migrates
Research shows the global population is not sustainable in the long term. There are about 3,000 breeding pairs left.
The main threat to the bird is becoming entangled in fishing gear, according to findings published in the Journal of Applied Ecology.
Other risks include hunting by the likes of cats and other small mammals.
Prof Tim Guilford of the Department of Zoology at the
co-researcher on the study. University
He told BBC News: "The survival of adults from one year to the next and especially of young adults is much lower than we thought.
"The species is unsustainable - it is on the road to extinction."