It inhabits forests and swamps across Central and West Africa ... but it is also known to feed on Asian rat snakes and pythons. Endemic to the Philippines, the Samar cobra (Naja samarensis ...

The Aesculapian snake can grow up to 6ft (1.8m) but the largest spotted here has been about 4ft 11in (1.5m). The rat-eating reptiles are near Mochdre, Conwy county. They are yet to cross the A55 ...