Hickory Flats peat moss and northern bog club moss. The five-rowed peat moss (Sphagnum quinquefanum) can be recognized by its rather short and stiff branches which appear angular because of the arrangement of its closely set leaves widely angled in 5 ranks. Red peat moss (Sphagnum rubellum) is a small reddish-coloured peat moss with tongue-shaped stem leaves. And northern bog club moss ("Lycopodiella inundata") has branches up to 10 cm high with narrow, pointed leaves 4–8 mm long. Hickory Flats provides a secluded habitat for a population of black bear ("Ursus americanus"). Since bears are shy and secretive, they are rarely seen.
Portlethen Moss have been enhanced by proximity to the sea and natural defensive protection of the moss to impede intruders. From Tacitus accounts of the Roman general Agricola, it is known that the Romans were daunted by Portlethen Moss, Netherley Red Moss, Cookney Moss and other local bogs that hindered travel. This is also evidenced by the Roman Camp of Raedykes having been established immediately south of this cluster of mosses; the Romans not being able to progress further north, turned inland toward Netherley.The Portlethen Moss is near the Grampian Mountains. The ancient Causey Mounth passage specifically connected the Bridge of Dee