Taricha granulosa

(Skilton, 1849)

Rough-skinned Newt

G5Secure Found in 132 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.100302
Element CodeAAAAF02010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomAnimalia
PhylumCraniata
ClassAmphibia
OrderCaudata
FamilySalamandridae
GenusTaricha
Other Common Names
rough-skinned newt (EN) Roughskin Newt (EN) Triton rugueux (FR)
Concept Reference
Frost, D. R. 1985. Amphibian species of the world. A taxonomic and geographical reference. Allen Press, Inc., and The Association of Systematics Collections, Lawrence, Kansas. v + 732 pp.
Taxonomic Comments
Although no subspecies are listed by Crother (2017), two subspecies are commonly recognized: the northern rough-skinned newt, T. g. granulosa, is found throughout the range; Crater Lake rough-skinned newt, T. g. mazamae, is found in the vicinity of Crater Lake, Oregon.

A high frequency of breeding adults on Gravina Island near Ketchikan, Alaska, display morphological characters similar to the Crater Lake subspecies, T. g. mazamae. Genetic studies suggest that newts from Wrangell Island differ little from those in Washington State (MacDonald 2003).
Conservation Status
Review Date2008-01-15
Change Date2001-12-03
Edition Date2010-01-25
Edition AuthorsHammerson, G.
Threat ImpactLow
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Rank Reasons
Large range in western North America; abundant; secure.
Range Extent Comments
Range includes the Pacific coast of North America from southeastern Alaska to Santa Cruz County, California (Petranka 1998, Stebbins 2003). Records from the Rocky Mountains in Idaho and Montana, including populations in Latah County, Idaho, could represent introductions, though Monello and Wright (1997) recorded three small populations in Latah County, Idaho, in 1997. Elevational range extends from sea level to about 9,200 feet (Stebbins 2003).
Occurrences Comments
Represented by many and/or large occurrences throughout most of the range.
Threat Impact Comments
This species may be detrimentally impacted by deforestation of areas surrounding breeding sites, though the degree of impact is difficult to quantify. Exposure to UV-B may alter certain behaviors that could have ecological and evolutionary consequences (Blaustein et al. 2000).
Ecology & Habitat

Description

Rough skin (except breeding males); upper side usually dark to light brown (with dark blotches in a few parts of the species range), under side usually yellow to reddish orange; usually dark pigment on lower eyelids and beneath eyes; small eyes (do not extend to outer margin of head when viewed from above; V-shaped patch of teeth in roof of mouth; up to 9 cm snout-vent length. Breeding male: smooth skin, bulbous vent, highly flattened tail, dark skin un undersides of feet. Breeding female: cone-shaped vent. Large larvae: large gills; tall tail fin extends to shoulder area; row of light spots on each side of back; belly sometimes pink or orange; up to 7.5 cm total length. Eggs: generally attached singly to objects in quiet water; egg/embryo moves freely in jelly capsule that is 3-4 mm in diameter.

Habitat

Rough-skinned newts inhabit various wooded and open valley habitats that include the required aquatic breeding habitat, such as lakes, reservoirs, ponds, and stream pools or backwaters. They generally spend most of their lives on land, but in some areas adults may be aquatic throughout the year or during the dry season. Breeding females attach eggs singly on aquatic plants or submerged twigs.

Ecology

After breeding season, adults, as well as subadults and larvae, may form large aggregations. Skin secretion repels many predators.

Reproduction

Timing of migrations and breeding varies greatly, depending on location and conditions. In many lowland areas, newts migrate to breeding sites and deposit eggs in late fall, winter, or spring, and the resulting larvae metamorphose several moinths later in summer or fall. At higher elevations in the mountains, breeding may occur in summer or early fall, with metamorphosis about a year later. Eggs hatch in 20-26 days (Nussbaum et al. 1983) or 5-10 weeks (Behler and King 1979).
Terrestrial Habitats
Forest - HardwoodForest - ConiferForest - MixedWoodland - HardwoodWoodland - ConiferWoodland - MixedSavannaGrassland/herbaceous
Palustrine Habitats
TEMPORARY POOLRiparian
Other Nations (2)
United StatesN5
ProvinceRankNative
IdahoSNANo
WashingtonS5Yes
CaliforniaSNRYes
OregonS5Yes
AlaskaS4Yes
CanadaN4
ProvinceRankNative
British ColumbiaS4Yes
Roadless Areas (132)
Alaska (26)
AreaForestAcres
Bay of PillarsTongass National Forest27,492
CalderTongass National Forest9,857
CamdenTongass National Forest36,793
Chilkat-West Lynn CanalTongass National Forest199,772
El CapitanTongass National Forest26,693
EudoraTongass National Forest195,022
FrostyTongass National Forest39,941
GravinaTongass National Forest37,381
Green RocksTongass National Forest11,093
HyderTongass National Forest121,723
Juneau UrbanTongass National Forest101,581
KartaTongass National Forest52,117
KekuTongass National Forest10,869
KogishTongass National Forest65,216
KosciuskoTongass National Forest64,134
LindenbergTongass National Forest25,855
MadanTongass National Forest68,553
North ClevelandTongass National Forest105,288
North EtolinTongass National Forest40,993
North RevillaTongass National Forest215,430
North WrangellTongass National Forest8,091
RedoubtTongass National Forest68,347
Rocky PassTongass National Forest78,163
South RevillaTongass National Forest52,105
SpiresTongass National Forest533,746
Thorne RiverTongass National Forest72,983
California (38)
AreaForestAcres
Bell QuinbyShasta-Trinity National Forest11,556
Blue Creek Rare ISix Rivers National Forest12,134
Board CampSix Rivers National Forest4,527
Bonanza KingShasta-Trinity National Forest16,402
Castle Crags AShasta-Trinity National Forest113
Castle Crags BShasta-Trinity National Forest1,619
ChinquapinShasta-Trinity National Forest22,040
Condrey Mtn.Klamath National Forest2,923
Cow CreekSix Rivers National Forest1,271
Cow CreekShasta-Trinity National Forest22,627
Devils RockShasta-Trinity National Forest16,209
EagleShasta-Trinity National Forest6,553
East ForkShasta-Trinity National Forest6,201
East GirardShasta-Trinity National Forest27,894
IshiLassen National Forest21,805
JohnsonKlamath National Forest10,652
KangarooKlamath National Forest40,617
Kettle Mtn.Shasta-Trinity National Forest4,589
Lake EleanorShasta-Trinity National Forest397
Little French CShasta-Trinity National Forest11,529
Mill CreekLassen National Forest7,587
Monkey CreekSix Rivers National Forest9,017
Mt. Shasta BShasta-Trinity National Forest2,809
Murphy GladeShasta-Trinity National Forest1,015
North Fork SmithSix Rivers National Forest37,898
Orleans Mtn.Klamath National Forest49,090
Orleans Mtn. BSix Rivers National Forest17,183
Orleans Mtn. CSix Rivers National Forest15,589
PattisonShasta-Trinity National Forest29,299
PortugueseKlamath National Forest18,915
RussianKlamath National Forest21,771
Ship MountainSix Rivers National Forest11,936
SiskiyouKlamath National Forest54,039
Siskiyou BSix Rivers National Forest18,871
Slate CreekShasta-Trinity National Forest6,636
SnoozerKlamath National Forest23,414
Tom MartinKlamath National Forest9,031
West GirardShasta-Trinity National Forest37,516
Idaho (1)
AreaForestAcres
Bear CreekCaribou-Targhee National Forest118,582
Oregon (39)
AreaForestAcres
Bull Of The WoodsWillamette National Forest53
Bull Of The WoodsMt. Hood National Forest8,843
CharltonDeschutes National Forest7,047
Charlton ButteWillamette National Forest3,031
Drift CreekSiuslaw National Forest6,333
EagleMt. Hood National Forest16,841
Echo MountainWillamette National Forest8,098
ElkhornWillamette National Forest9,380
FairviewUmpqua National Forest7,417
Gordon MeadowsWillamette National Forest9,463
Hardesty MountainWillamette National Forest3,754
Hebo 1aSiuslaw National Forest13,930
LakeMt. Hood National Forest1,327
LarchMt. Hood National Forest12,961
Maiden PeakWillamette National Forest9,627
Maiden PeakDeschutes National Forest26,432
Menagerie (rooster Rock)Willamette National Forest374
Middle SantiamWillamette National Forest7,316
Moose LakeWillamette National Forest5,013
Mt. JeffersonDeschutes National Forest2,282
Mt. HagenWillamette National Forest6,406
Mt. Hood AdditionsMt. Hood National Forest13,061
North KalmiopsisSiskiyou National Forests91,560
OlallieMt. Hood National Forest7,607
Opal CreekWillamette National Forest5,417
Roaring RiverMt. Hood National Forest27,316
Salmon - HuckleberryMt. Hood National Forest17,570
Shasta CostaSiskiyou National Forests14,420
Sky Lakes AWinema National Forest3,940
Smith UmpquaSiuslaw National Forest7,622
South KalmiopsisSiskiyou National Forests104,477
TahkenitchSiuslaw National Forest5,799
TenmileSiuslaw National Forest10,818
Twin LakesMt. Hood National Forest6,055
Umpqua SpitSiuslaw National Forest2,090
Waldo - FujiWillamette National Forest15,273
Waldo - LakeWillamette National Forest2,993
Wind CreekMt. Hood National Forest5,438
WoahinkSiuslaw National Forest5,309
Texas (1)
AreaForestAcres
Big CreekNational Forests in Texas1,447
Washington (27)
AreaForestAcres
Bear CreekGifford Pinchot National Forest7,980
Big Lava BedGifford Pinchot National Forest19,043
Blue SlideWenatchee National Forest17,505
Boulder RiverMt Baker-Snoqualmie National Forest32,563
ChelanWenatchee National Forest74,650
Dark DivideGifford Pinchot National Forest52,483
EntiatWenatchee National Forest72,617
Glacier Peak KMt Baker-Snoqualmie National Forest47,269
Goat Rocks AdjWenatchee National Forest6,108
Green MountainOlympic National Forest4,617
Jefferson RidgeOlympic National Forest6,512
Jupiter RidgeOlympic National Forest10,148
LightningOlympic National Forest7,179
ManastashWenatchee National Forest11,155
Mt. Baker MaMt Baker-Snoqualmie National Forest24,847
Mt. Baker Noisy - DiobsudMt Baker-Snoqualmie National Forest56,039
Mt. Baker WestMt Baker-Snoqualmie National Forest25,390
Mt. BaldyOlympic National Forest3,557
PressentinMt Baker-Snoqualmie National Forest14,545
QuartzWenatchee National Forest8,550
QuilceneOlympic National Forest18,656
SiouxonGifford Pinchot National Forest12,773
South QuinaultOlympic National Forest11,081
Stormy Mtn.Wenatchee National Forest32,612
TaneumWenatchee National Forest26,140
TumwaterGifford Pinchot National Forest8,676
Upper SkokomishOlympic National Forest9,311
References (22)
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  2. Behler, J. L., and F. W. King. 1979. The Audubon Society field guide to North American reptiles and amphibians. Alfred A. Knopf, New York. 719 pp.
  3. Blackburn, L., P. Nanjappa, and M. J. Lannoo. 2001. An Atlas of the Distribution of U.S. Amphibians. Copyright, Ball State University, Muncie, Indiana, USA.
  4. Blaustein, A.R., D.P. Chivers, L.B. Kats and J.M. Kiesecker. 2000. Effects of ultraviolet radiation on locomotion and orientation in Roughskin Newts (<i>Taricha granulosa</i>). Ethology 106: 227-234.
  5. Carstensen, R., M. Willson and R. Armstrong. 2003. Habitat use of amphibians in northern southeast Alaska. Unpublished report to Alaska Department of Fish and Game. Juneau, AK: Discovery Southeast.
  6. Crother, B. I. (editor). 2017. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. 8th edition. SSAR Herpetological Circular 43:1-104. [Updates in SSAR North American Species Names Database at: https://ssarherps.org/cndb]
  7. Frost, D. R. 1985. Amphibian species of the world. A taxonomic and geographical reference. Allen Press, Inc., and The Association of Systematics Collections, Lawrence, Kansas. v + 732 pp.
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  10. Girdner, S.F., A.M. Ray, M.W. Buktenica, D.K. Hering, J.A. Mack, and J.W. Umek. 2017. Replacement of a unique population of newts (<i>Taricha granulosa mazamae</i>) by introduced signal crayfish (<i>Pacifastacus leniusculus</i>) in Crater Lake, Oregon. Biological Invasions 20:721-740.
  11. Hodge, R. P. 1976. Amphibians and reptiles in Alaska, the Yukon and Northwest Territories. Alaska Northwest Publishing Company Anchorage, Alaska. 89 pp.
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  13. Monello, R. J., and R. G. Wright. 1997. Geographic distribution: <i>Taricha granulosa</i>. Herpetological Review 28:155.
  14. Nussbaum, R.A. and Brodie, E.D. Jr. 1981. Taricha granulosa. Catalogue of American Amphibians and Reptiles. 272:1-4.
  15. Nussbaum, R.A., E.D. Brodie, Jr., and R.M. Storm. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho, Moscow, Idaho. 332 pp.
  16. Petranka, J. W. 1998. Salamanders of the United States and Canada. Smithsonian Institution Press, Washington, D.C.
  17. Stebbins, R. C. 1954a. Amphibians and reptiles of western North America. McGraw-Hill Book Company, New York.
  18. Stebbins, R. C. 1985a. A field guide to western reptiles and amphibians. Second edition. Houghton Mifflin Company, Boston, Massachusetts. xiv + 336 pp.
  19. Stebbins, R. C. 2003. A field guide to western reptiles and amphibians. Third edition. Houghton Mifflin Company, Boston.
  20. U.S. Fish and Wildlife Service (USFWS). 2024.90-Day Findings for 8 Species. Notification of petition findings and initiation of status reviews. Federal Register 89(195): 81388-81394.
  21. Washington Herp Atlas. 2009 (map products updated March 2017). A cooperative effort of Washington Natural Heritage Program, Washington Department of Fish and Wildlife, U.S.D.I. Bureau of Land Management, and U.S. Forest Service. 250 pp.
  22. Waters, D.L. 1992. Habitat associations, phenology, and biogeography of amphibians in the Stikine River basin and southeast Alaska. Unpubl. rep. of the 1991 pilot project. U.S. Dept. Interior, Fish and Wildlife Service, California Cooperative Fishery Research Unit, Humboldt State University, Arcata, CA. 61 pp.