The Norwegian lemming is a small rodent with a compact body and short tail. It lives in the cold tundras of Scandinavia and is known for sharp population fluctuations and mass migrations in search of food.
The Norwegian lemming serves as an important food source for arctic foxes, polar owls, and other tundra predators. Sharp increases in its population affect the entire ecosystem, causing changes in plant and animal populations.
homogamy, reproduction always with fertilization, no alternation of generations
Worker
birth time
breeding
Dogs, dolphins, lynx hang out for 9-25 years and party on their birthday three times a year
m
Map
will celebrate their {n} birthday
g
summer mild, +15…+20 °C
t
When your next jubilee falls in {name} life years
Human
Claws color
very cold, short summer, almost no trees, lots of moss
days
How old you would be if you lived as {name}
Theoretical maximum lifespan estimated from the Dynamic Energy Budget (DEB) mathematical model. This value reflects a biological potential derived from metabolic parameters, not from direct observation — real recorded lifespans are often significantly shorter.
adult
Maturity
plants
About health
milk
When your next birthday would fall if you lived as {name}
Repro interval
results
lichens — a mixture of fungus and algae on rocks and trees
Colors
Cool summer
Sex
Upcoming jubilees
Gremllins
mo
Uses an excavated underground tunnel or chamber for refuge or nesting.
alpine meadows and arctic tundra on land
Trophic type
Filters
Palearctic realm
grass
roots of plants
Upcoming birthdays
protection
Winter with snow
eggs, roe or offspring develop in a nest built on the ground or close to it
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
in a burrow
rains almost always, very humid
young are born live on land, not hatched from eggs or roe
Age (juvenile)
Age (from birth to death)
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
Jubilee = every 10th birthday
Tundra
Earliest developmental stage inside an egg or womb.
Business sausages
roots
Lifespan average
in a terrestrial nest
Incisors color
live birth
What do they look like?
Maturity
emergence (insects)
end of lifespan
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
end of acceleration
Share
Find a pet...
Mature, fully developed individual capable of reproduction.
nest hidden in an underground burrow
Pets
Lots of rain and cool summer
{name} jubilee
Claws count
cm
Old-timers
Find an animal or breed...
Claws size
turns
Rascals
Flooded grasslands
drink mother's milk in childhood
Litter size
mosses, liverworts and other terrestrial bryophytes
Map data sources: Ecosystem classification — IUCN Global Ecosystem Typology (Keith et al., 2022), indicative distribution maps Keith et al. (2020), https://doi.org/10.5281/zenodo.3546513; Large Marine Ecosystems — NOAA LME Program; Bathymetry — GEBCO Bathymetric Compilation Group (2026), GEBCO_2026 Grid, https://doi.org/10.5285/4f68d5c7-45eb-f999-e063-7086abc036fa; Climate data — Generated using Copernicus Climate Change Service information; Species occurrence data — GBIF.org, Derived dataset "all animals", https://zveriki.com/dataset/dataset.tsv; Terrestrial ecoregions — RESOLVE Ecoregions 2017 (Dinerstein et al., 2017), CC BY 4.0
How to care for them?
Living from 25 to 40 years. Orangutans, bald eagles, African elephants celebrate their birthday twice a year
grazing
°C
Not specified
alpine and arctic tundra
Where are they found?
nest hidden in an underground burrow, only the mother provides parental care for the offspring
38 to 65 grams, 15 – 40 centimeters
herbivore
lots of rain, cool summer, snow in winter
Feeds by cropping or nibbling low-growing vegetation or algae.
Incisors size
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Elders
leaves and stems of grasses and other herbaceous vegetation
Bro
normal sexual
Taxons
if born as {name}
cold, short summer, almost no trees
lichens
age
birth date
Palearctic realm
rest
Fur color
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
herbivory, feed only on plant food
moss
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
primary food sources
teeth
burrow
after transformation until death
Potential Habitat
d
In husbandry
On the go from 1.3 to 3.5 years. Forest mice, anoles, rainbow fish party on their birthday once a month
Mass
cold winter, lots of coniferous trees: spruce, pine
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
Plants
Gestation
land
{name} birthday
grass
sedge
No results found
On the map
all life stages
Female ♀
gnaws plants
high-mountain tundra above the tree line
Map data sources: Ecosystem classification — IUCN Global Ecosystem Typology (Keith et al., 2022), indicative distribution maps Keith et al. (2020), https://doi.org/10.5281/zenodo.3546513; Large Marine Ecosystems — NOAA LME Program; Bathymetry — GEBCO Bathymetric Compilation Group (2026), GEBCO_2026 Grid, https://doi.org/10.5285/4f68d5c7-45eb-f999-e063-7086abc036fa; Climate data — Generated using Copernicus Climate Change Service information; Species occurrence data — GBIF.org, Derived dataset "all animals", https://zveriki.com/dataset/dataset.tsv; Terrestrial ecoregions — RESOLVE Ecoregions 2017 (Dinerstein et al., 2017), CC BY 4.0
Potential habitat modelled from GBIF occurrence data. Map © Zveriki.com, licensed under CC BY 4.0.
birth year
Shelter used specifically for reproduction or nesting.
Maturity
caring mother
terrestrial habitat, land surface outside water
sq mm
yr
How similar?
Male ♂
until the celebration
baby / chick
Tundra
age as {name}
How do they breed?
On the go from 3.5 to 6 years. Hedgehogs, crows, lizards treat themselves to birthday snacks 6 times a year
What if eaten?
Neither
from birth to adulthood
Young offspring still dependent on parental care.
What do they eat?
Where do they live?
moss
Immature individual that has not yet reached reproductive maturity.
much snow in winter, cold
highland tundra
Hard dental structures used to bite, tear, or scrape food.
water often floods the land, lots of grass
Duration
This is me
most of Europe and Asia, various forests, steppes and tundra
Always very wet
Gamers
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
sedge, reed and other coastal herbaceous plants
terrestrial
Taiga
Asexual
swap
roots and plant tubers
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Where do they take shelter?
inhabit and develop on land, outside water bodies
sedge and reeds
celebrated their {n} birthday
When you would have been born if you lived as {name}
Daddies
Lifespan maximum
Hermaphrodite ⚥
embryo
Orange
Incisors count
Length
kg
Observations
◉{N} more on tap