The common beaver is a large semi-aquatic rodent with strong teeth and a flat tail. It builds dams on rivers, creating ponds and lodges for living.
The Eurasian Beaver differs from the Canadian beaver by its narrower muzzle and smaller size. It is very important for nature because its dams create new water bodies that help fish, birds, and other animals.
homogamy, reproduction always with fertilization, no alternation of generations
Worker
Tail size
birth time
wood, tree bark
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
t
When your next jubilee falls in {name} life years
Human
days
Warm summer
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
Carry-on luggage
About health
milk
When your next birthday would fall if you lived as {name}
Repro interval
results
summer warm, winter not very cold
Colors
Sex
Upcoming jubilees
Gremllins
mo
Uses jaws or beak to break hard-shelled or tough food items.
Uses an excavated underground tunnel or chamber for refuge or nesting.
Trophic type
Filters
Tail count
Palearctic realm
leaves
grass
Upcoming birthdays
standing fresh waters — lakes, ponds, oxbow lakes
Breeding structure built or used for laying eggs and raising offspring.
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
Height
nest on the ground
rains almost always, very humid
young are born live on land, not hatched from eggs or roe
bark
aquatic plants
4.8 to 6 kilograms, 0.8 – 1.4 meters
Age (juvenile)
Age (from birth to death)
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
algae
Jubilee = every 10th birthday
Earliest developmental stage inside an egg or womb.
Business sausages
Very cold winter and hot summer
Lifespan average
nest located directly on the ground surface on land, only the mother provides parental care for the offspring
in a terrestrial nest
leaves
Incisors color
grasses
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
swampy freshwater biotopes — peat bogs, marshes, river mangroves
Find a pet...
Mature, fully developed individual capable of reproduction.
nest hidden in an underground burrow
Freshwater
very cold winter and very hot summer
gnaws bark and branches with sharp incisors, grinds plant food with molars
Pets
all rivers and lakes
Lots of rain and cool summer
Feeding occurs primarily on land or in vegetation.
{name} jubilee
cm
Summer from cool to warm
Old-timers
Find an animal or breed...
turns
Rascals
Tail color
Flooded grasslands
drink mother's milk in childhood
Forages on tree limbs or woody stems within vegetation.
Litter size
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
temperate forest
How to care for them?
Living from 25 to 40 years. Orangutans, bald eagles, African elephants celebrate their birthday twice a year
grazing
wood
°C
Not specified
Where are they found?
nest hidden in an underground burrow, only the mother provides parental care for the offspring
all rivers and lakes
herbivore
lots of rain, cool summer, snow in winter
Feeds by cropping or nibbling low-growing vegetation or algae.
Incisors size
Locomotion through water employed while searching for or capturing prey.
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
lakes and ponds
normal sexual
freshwater marsh and wetlands
Taxons
rivers and streams
if born as {name}
Foraging takes place among trees and woody vegetation.
age
birth date
swimming
Palearctic realm
Fur color
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
bark and bast of trees and shrubs
climbing
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
Insects
primary food sources
teeth
burrow
bark
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
Feeding occurs in water bodies such as rivers, lakes, or oceans.
Mass
young shoots and leaves of plants
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
terrestrial
Plants
Gestation
aquatic
land
{name} birthday
No results found
branches
On the map
Pleasant summer
Female ♀
all life stages
nest located directly on the ground surface on land
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
tree bark
Maturity
caring mother
terrestrial habitat, land surface outside water
sq mm
yr
comfortable summer, +20…+25 °C
How similar?
Male ♂
until the celebration
baby / chick
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
Moving up vertical surfaces like trunks or rocks to reach food.
Young offspring still dependent on parental care.
nest
caring mother
What do they eat?
Where do they live?
much snow in winter, cold
Webbed hind feet count
Hard dental structures used to bite, tear, or scrape food.
water often floods the land, lots of grass
branch
Freshwater
Temperate mixed forest
Duration
This is me
most of Europe and Asia, various forests, steppes and tundra
freshwater
Always very wet
Gamers
aquatic plants and algae
crushing
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
terrestrial
Taiga
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
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?
Warm summer and lots of rain
inhabit and develop on land, outside water bodies
celebrated their {n} birthday
When you would have been born if you lived as {name}
flowing fresh waters — rivers, streams, mountain torrents
Daddies
Lifespan maximum
summer not hot, from +15 to +25 °C
Hermaphrodite ⚥
embryo
Incisors count
summer warm, many oaks, birches, maples
Length
kg
lots of rain, warm and pleasant summer
arboreal
Observations
◉{N} more on tap