Nature lovers are hunting for a one-inch long bug named as one of the most endangered creatures in the country.
The mating squeak of the New Forest Cicada is so high-pitched that only children and people younger than 40 are likely to hear it.
It has not been seen since 2000 and there are fears that it may be extinct.
However, a dedicated team of bug hunters believes there might be one or two lurking in the New Forest, which covers parts of Hampshire, south-east Wiltshire and Devon.
The Species Recovery Trust, an online project looking at Britain’s most endangered animals, says more than 400 species – including the great auk, orange-spotted emerald dragonfly and the wildcat – have become extinct in the past 200 years.
The trust says the New Forest Cicada is one of the 10 animals most likely to become extinct. The last sighting of a cicada 14 years ago was unconfirmed.
Changes in habitat and weather have led to a decline in numbers, the trust said. The New Forest Cicada Project has devised an app so people can use their smartphones to detect the creatures.