montana (New Forest cicada) – not seen in Britain since 2000. Arachnids Gibbaranea bituberculata — 1954 Hypsosinga heri — 1912 Mastigusa arietina — 1926 Crustaceans Artemia salina (brine shrimp) – after 1758 Molluscs Land snails Fruticicola fruticum Cernuella neglecta Reintroduction and re-establishment The white-tailed eagle has been successfully re-established on the western coast of Scotland. Having clung on in parts of Wales, red kites have been successfully re-established in parts of England and Scotland. Ongoing projects involve both these species: the corn crake into parts of England and Scotland, and the great bustard on Salisbury Plain. European beavers have been reintroduced to parts of Scotland, and there are plans to bring them back to other parts of Britain. A five-year trial reintroduction at Knapdale in Argyll started in 2009 and concluded in 2014. A few hundred beavers live wild in the Tay river basin, as a result of escapes from a wildlife park. A similar reintroduction trial is being undertaken on the river otter in Devon, England. Also, around the country, beavers have been introduced into fenced reserves for many reasons including flood prevention. In 2016, beavers were recognised as a British native species, and will be protected under law. In 2008, Eurasian elk were released into a fenced reserve on the Alladale Estate in the Highlands of Scotland. Reindeer were re-established in 1952; approximately 150–170 reindeer live around the Cairngorms region in Scotland. Set up by the Wildwood Trust, Konik horses have been established across many reserves as a proxy for the extinct tarpan. In 1998, MAFF, now known as DEFRA released a report concerning the presence of two populations of wild boar living freely in the UK. These boar are thought to have escaped from wildlife parks, zoos and from farms where they are farmed for their meat, and gone on to establish breeding populations. Around 20 white storks pass through the UK each year. A colony at the Knepp Wildland in West Sussex, aided by zoologist Roisin Campbell-Palmer, hopes to reinforce these off-path migrants by introducing adults into a fenced reserve, where the juveniles born will be able to establish other colonies further afield. The northern clade of the pool frog was reintroduced from Swedish stock in 2005, to a single site in Norfolk, England, following detailed research to prove that it had been native before its extinction around 1993. Smaller species, mainly reptiles, such as the