There are seven species of reptile found in the UK. All are shy and usually hard to see and two are endangered. The most enigmatic are the adder and the wall lizards which are found only in the botanical gardens at Ventnor on the Isle of Wight. They were introduced in the 1800s and have managed to thrive on this one site and no where else in the UK, it seems. They are superficially similar to the common lizard but have a longer tail.