adult albino dusky salamander

absence adult albinism albino allegheny amphibian animal anomaly background beautiful biodiversity blue camouflage close closeup coloration congenital desmognathus disadvantage disease disorder dusky eyes fuscus genetic genetics lack lacking macro medical melanin monticola mountain mutation nature northern orestes pigment plethodontidae quadramaculatus rare red ridge salamander skin southern spring surviving uncommon unnatural virginia wild wildlife