Amphibia · Caudata
Notophthalmus viridescensRafinesque, 1820
Eastern Newt
Photograph by Laura J. Costello, CC BY, via iNaturalist
A nocturnal salamander reaching 140 mm nose to tail.
Amphibia › Caudata › Salamandridae › Notophthalmus
- Grows to
- 140mm
- greatest recorded
- Active
- Nocturnal
- Lives up to
- 25years
- Lives
- Aquatic, arboreal, terrestrial
Longer than only 31% of all salamanders anyone has measured.
The bar is the rank itself: its length is the share of the family this animal exceeds. The chart below is the family’s real spread, on a logarithmic scale because body length here runs from 60 to 324 mm. The solid rule is this animal. Every bar is a count of real species, and nothing on this figure is estimated.
What is known
22 sourced facts, each taken from a named scientific dataset. How to read these.
Cited from a dataset unless a row is marked otherwise.
Standing in the world
- Conservation status
- Least Concern
- Population trend
- Stable
as reported by the IUCN Red List
The animal itself
- Longest recorded life
- 25years
Size
- Length nose to tail · greatest recorded
- 140mm5.5 in
- Body mass · greatestmeasured
- 3.9g0.14 oz
total length, tail included — this source reports total length for Caudata and Gymnophiona
maximum adult body mass as recorded in the source
How it lives
- Eats arthropods
- Yes
- Eats vertebrates
- Yes
- Eats plant matter
- Unknown
- Active
- Nocturnal
- Where it lives
- Aquatic, arboreal, terrestrial
a blank flag in this source means unrecorded, not absent
Breeding
- Reproduction
- Oviparous
- How the young develop
- Through a larval stage
- Average clutch
- 287.5
- Eggs or young per clutch
- 200–375eggs
- Clutches in a year
- 1per year
- Hatchling length
- 1.5mm
- Age at first breeding · female
- 2000days
- Mature at
- 0.5–5.5years
- Size at maturity
- 51–90mm2–3.5 in
midpoint of the reported range — Oliveira, São-Pedro, Santos-Barrera, Penone, and Costa, 2017, Sci. Data, 4:170123
AnAge rates this record "acceptable"
Naming and history
- Described by
- Rafinesque
- Moved to another genus · since it was first described
- Yes
- Described in
- 1820
Keeping one
- Land
- 70 × 70cm
- Water, at least 56 cm deep
- 140 × 56cm
Minimum, and for two animals — which is how the standard states it. Bigger is always better. Around 56 cm tall on average.
The standard gives 5 × 5 body lengths of land and 10 × 4 of water, for two animals.
For each further animal the standard asks for another 28 × 28 cm of land and 42 × 42 cm of water.
Swiss Tierschutzverordnung (TSchV), SR 455.1, Anhang 2, Tabelle 6 — legally binding minimum enclosure sizes for amphibians, given as multiples of total body length and stated for two animals.
From this animal’s own total length of 5.5 in (140 mm) — how this is worked out.
Eastern Newt
Feeding
1kJ per day
Worked out for an animal of 4 g, the heaviest recorded for Eastern Newt — so it is the top of the range, not a figure for a particular animal. Weigh yours and the number will be lower.
An upper estimate, not a feeding target, and not veterinary advice. The equation covers only what an animal burns staying alive, so a growing, gravid or recovering animal needs more — and it was measured on wild animals, which move far more than one in an enclosure. Body condition and a vet who knows the species are what a feeding decision should rest on. Where this comes from.
What nobody knows
These are not gaps in our research. No scientific dataset records them for this species — and saying so is information you cannot get from a reference that simply leaves a field out.
- — Still living
- — Length snout to vent · greatest recorded
- — Length snout to vent · adult female mean
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Female length · mean, nose to tail
- — Length nose to tail · adult male mean
- — Length nose to tail · adult mean
- — Largest female · snout to vent
- — Largest male · snout to vent
- — Largest female · shell length
- — Largest male · shell length
- — Hatchling length · snout to vent
- — Hatchling length · nose to tail
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Body mass at hatching
- — Preferred body temperature · chosen in a laboratory gradient
- — Body temperature when active · measured in the wild
- — Diet
- — How it hunts
- — Gestation or incubation
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches a year · fewest
- — Clutches a year · most
- — First breeds from · youngest recorded
- — First breeds by · oldest recorded
- — Venomous
- — Fangs
- — Body temp in the wild · lowest mean recorded
- — Body temp in the wild · highest mean recorded
- — Limbs
- — Colour on the back
- — Pattern on the back
- — Pupil
- — Sex decided by
- — Status assessed · the year the Red List last looked
- — Red List criteria
- — Region
- — Biome
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Suborder
- — Infraorder
- — Subspecies
- — Type locality
- — Habitat
- — Active in
- — Mainland or island
- — Lowest it lives · above sea level
- — Highest it lives · above sea level
- — Range size
Others in Salamandridae
Take this data
Everything on this page is available as data under CC BY 4.0 — use it freely, credit it, no permission needed.
This species as JSON · the whole dataset
Cite this page
The Reptile & Amphibian Encyclopedia (2026). Notophthalmus viridescens. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/notophthalmus-viridescens
@misc{notophthalmus_viridescens_2026,
title = {Notophthalmus viridescens},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/notophthalmus-viridescens}
}Sources
- Moura, M. R. et al. TetrapodTraits: a database of 33,281 tetrapod species. Used under CC BY 4.0. Observed values only; this encyclopedia does not publish its imputed predictions.
- AnAge, Human Ageing Genomic Resources (de Magalhães et al.), used under CC BY 3.0.
- Oliveira, B.F. et al. (2017). AmphiBIO, a global database for amphibian ecological traits. Scientific Data 4:170123. Used under CC BY 4.0.
- GBIF Secretariat. GBIF Backbone Taxonomy. Used under CC BY 4.0. Common names aggregated from constituent checklists.
- Catalogue of Life (dataset 3LR), used under CC BY.