The flora provides a habitat for several species of invertebrates. These include moths such as the argent and sable moth ("Rheumaptera hastata") and narrow bordered bee hawk-moth ("Hemaris tityus"). While butterfly species include the small heath ("Coenonympha pamphilus"), pearl-bordered fritillary ("Boloria euphrosyne") and small pearl-bordered fritillary ("Boloria selene"). Beetles found in the valley include the lesser silver water beetle ("Hydrochara caraboides") and one-grooved diving beetle ("Bidessus unistriatus"). There are also shining ram's-horn snails ("Segmentina nitida") and shrill carder bees ("Bombus sylvarum"). The River Brue and its tributaries support a population of European eels ("Anguilla anguilla"). Reptiles found include the European adder ("Vipera berus") and grass snake ("Natrix natrix"). Multiple bird species include Bewick's swan ("Cygnus columbianus bewickii"), Eurasian bittern ("Botaurus stellaris"), Eurasian bullfinch ("Pyrrhula pyrrhula"), *Eurasian wigeon ("Anas penelope"), European starling ("Sturnus vulgaris"), gadwall ("Anas strepera"), grasshopper warbler ("Locustella naevia"), hen harrier ("Circus cyaneus"), house sparrow ("Passer domesticus"), linnet ("Carduelis cannabina"), marsh harrier ("Circus aeruginosus"), marsh tit ("Poecile palustris"), merlin ("Falco columbarius"), northern lapwing ("Vanellus vanellus"), peregrine ("Falco peregrinus"), reed bunting ("Emberiza schoeniclus"), short-eared owl ("Asio flammeus"), skylark ("Alauda arvensis"), song thrush ("Turdus philomelos"), teal ("Anas cracca"), willow tit ("Poecile montanus") and yellowhammer ("Emberiza citrinella"). Mammalian species of interest include the brown hare ("Lepus europaeus"), Eurasian harvest mouse ("Micromys minutus"), European otter ("Lutra lutra") and water vole ("Arvicola terrestris").