Reported by BBC Science
Experts praised the discovery as a positive sign for the species future
A rare species of beetle has been found in Pembrokeshire after being missing from Wales for 60 years.
The Short-Necked Oil Beetle are dependent on solitary bees for its lifecycle and need a particular habitat to survive, with thick vegetation for shelter and dense flower coverage both essential.
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They were not reported in the UK for almost 60 years after 1948 as habitat loss brought the species to the brink of extinction.
Anne Hobbs, from the Bumblebee Conservation Trust, said it was "very exciting" that the evidence suggested the species was breeding in Wales again.
Last year, the survey at Castlemartin found only dead adults of this particular beetle, raising concerns about the future of this species and its continued presence on the site.
But this year, after three years of searching, experts discovered larvae of the beetle on a small area of the site, suggesting that surveyors had managed to find some of the hatchlings from a larger batch of immature beetles.
The number and distribution of the beetle larvae seen also supported this, according to Natural Resources Wales (NRW).
The Short-Necked Oil Beetle is classed as nationally rare within Great Britain and listed as vulnerable on the IUCN Red List , external .
They can typically be found from March to June in flower-rich coastal grassland and sand dune habitat, and are most active on warm, sunny days.
Adults can grow up toe 24mm (0.9in) in length and the life span of an adult is approximately one year.
NRW said these conditions mean there are only a handful of suitable sites in the UK.
They were rediscovered in Devon in 2006 and on the Isle of Coll, in Scotland, in 2009. Since then, populations have been found on Tiree, Islay, Barra and Uist.
Castlemartin Range, in Pembrokeshire, is currently the only place in Wales where the species can be found and it is being consistently surveyed by conservationists.
The project is part of Wales's "flagship species recovery programme", said NRW, which works to conserve the Short-Necked…