 There are brown trout , European eel and three @-@ spined stickleback in the streams , and salmon occasionally run in the Kinloch River . The only amphibian found on Rùm is the palmate newt and the only reptile native to Rùm is the common lizard . Invertebrates are diverse and have been studied there since 1884 , numerous species of damsel fly , dragonfly , beetle , butterflies , moths etc. having been recorded . Several rare upland species are found on the ultrabasic slopes of Barkeval , Hallival and Askival including the ground beetles Leistus montanus and Amara quenseli . The midge ( Culicoides impunctatus ) , a biting gnat , occurs in " unbelievable numbers " . 
