The original list was published in Holmes, R. T. and G. E. Likens. 1999. Organisms of the Hubbard Brook Valley, New Hampshire. USDA Forest Service, Northeastern Research Station, General Tech. Report NE-257. 32 pp. The list is updated here (January 2021) to include additional species observed since the original publication, update taxonomic classifications, and provide annotations on distribution.

Order Family Scientific_name Common_name Notes
Anura Bufonidae Anaxyrus americanus American Toad Breeds in ponds in west end of valley and Mirror Lake. Widespread throughout forest from lower elevations to Mt. Kineo. Fewer observed in 2010s than in earlier years (Holmes)
Anura Hylidae Hyla versicolor Gray Tree Frog Primarily around Mirror Lake; no records from the forest in HBEF.
Anura Hylidae Pseudacris crucifer Spring Peeper Breeds in ponds throughout the valley, occasionally seen wandering across forest litter.
Anura Ranidae Lithobates catesbesiana Bull Frog Common in Mirror Lake
Anura Ranidae Lithobates clamitans Green Frog Common from lower Hubbard Brook valley to top of Mt. Kineo. Mainly along streams and in sphagnum bogs.
Anura Ranidae Lithobates palustris Pickerel Frog Mirror Lake and beaver ponds at western end of Hubbard Brook valley.
Anura Ranidae Lithobates pipiens Northern Leopard Frog Status and distribution uncertain
Anura Ranidae Lithobates sylvatica Wood Frog Breeds in ephemeral ponds, disperses across the forest floor. Common and widespread throughout the valley.
Caudata Plethodontidae Desmognathus fuscus fuscus Northern Dusky Salamander Patchily distributed in steams throughout the valley and in seeps.
Caudata Plethodontidae Eurycea bislineata bislineata Northern Two-lined Salamander Widely distributed in streams throughout the valley, including Hubbard Brook mainstem.
Caudata Plethodontidae Gyrinophilus porphyriticus porph Northern Spring Salamander Found commonly in headwater streams and smaller tributaries (1st-3rd order) at higher elevations in the valley.
Caudata Plethodontidae Plethodon cinereus Red-backed Salamander Widely distributed in foest litter throughout the valley. Numbers lower in 2010s (Likens) compared to 1970s (Burton).
Caudata Salamandridae Notophthalmus viridescens viride Red-spotted Newt Breeds in ponds in western end of valley, efts disperse across the forest floor. Also, common in and around Mirror Lake.
Caudata Ambystomatidae Ambystoma maculatum Spotted Salamander Found in and around ponds at upper end of Hubbard Brook valley (W. Lowe) and around Mirror Lake (D. Buso).