Being closely related Plethodon species, P. cinereus and P. hubrichti demonstrate a number of behavioral similarities in addition to a similarity in size (6.5-12.5 cm and 8-13 cm total length, respectively) [REF].
The Peaks of Otter salamander may be environmentally restricted,[REF] and abiotic climatic features may provide the limiting factor for P. hubrichti, with P. cinereus exhibiting less environmental sensitivity and its range is prevented from encroaching upon allopatric P. hubrichti zones by interspecific competitive with P. hubrichti.