bielzia coerulans or carpathian blue slug crawls on dry leaves in spring forest

blue slug coerulans bielzia carpathian wild slimy slime gastropod wildlife life slither nature animal disease slip close forest land view keelback gastropoda vermin gliding limacidae mucus snail macro tentacle ground terrestrial leaves color portrait amazing dry mollusc slow europe eyes endemic outdoor natural beautiful environment closeup crawls spring rare forests