High caution and timidity towards humans, strong herd instinct, formation of stable harem groups or bachelor herds, territoriality of stallions, pronounced vigilance and quick reactions to threats.
Feral horse (cimarron, mustang, brumby, etc.) — feral descendants of the domestic horse (Equus caballus) with a primitive body type. Height at withers 1300–1550 mm, weight 300000–550000 g (average 350000–450000 g). Strong, dry, compact build with a short back, well-developed musculature and strong limbs. Head relatively large (480–580 mm), profile straight or slightly concave. Ears 110–160 mm. Eyes large, dark brown. Neck muscular, stallions with a pronounced crest. Body deep, chest girth 1600–1900 mm. Limbs dry, with strong cannon bone (girth 175–210 mm). Hooves very strong, dense. Tail hair 600–950 mm. Coat: short and shiny in summer, thick and long (up to 40–60 mm) in winter with undercoat. Predominant colors: bay, black, chestnut, gray, dun, mouse-gray; primitive markings (zebra stripes, dorsal stripe) often present. Differs from selected breeds by drier constitution, strong hooves, pronounced seasonal coat change, large head and high intrapopulation variability. Format index 1.02–1.08.
Claws length
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Immature form that undergoes metamorphosis before adulthood.
training aptitude
Worker
Elders
Bro
birth time
Taxons
if born as {name}
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
open steppes prairies semi deserts
g
age
t
When your next jubilee falls in {name} life years
Human
birth date
Fur length
Claws color
Close
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
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.
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Confidence
Potential Habitat
About health
When your next birthday would fall if you lived as {name}
Piano
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
results
Mass
Tail length
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
temperature for housing
Sex
{name} birthday
Upcoming jubilees
Gremllins
mo
No results found
Torso length
Filters
Eyes color
On the map
Female ♀
Upcoming birthdays
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.
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
birth year
sq mm
yr
Wanderers
How similar?
Jubilee = every 10th birthday
Male ♂
until the celebration
Torso width
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
Minimum space
What if eaten?
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
Head length
Lifespan average
What do they eat?
Where do they live?
early young
Eyes diameter
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.
300 to 350 kilograms, 1.8 – 2.5 meters
This is me
Gamers
Pets
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
{name} jubilee
Asexual
swap
cm
Old-timers
Find an animal or breed...
Whiskers length
turns
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Rascals
Where do they take shelter?
Legs length
celebrated their {n} birthday
When you would have been born if you lived as {name}
Litter size
Daddies
Lifespan maximum
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
°C
Not specified
Hermaphrodite ⚥
Where are they found?
embryo
Length
kg
Observations
◉{N} more on tap