The Javan chevrotain is the world's smallest ungulate. Its body is only 45–55 centimeters long, and its weight does not exceed 2.5 kilograms.
The Javan chevrotain differs from other deer in its tiny size, lack of antlers, and long fangs in males. It disperses plant seeds through the forest and serves as an important part of the food chain.
homogamy, reproduction always with fertilization, no alternation of generations
Worker
birth time
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
very hot and very humid all year round, rain almost every day
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
South and Central America, hot and humid, huge forests
Melon
About health
milk
When your next birthday would fall if you lived as {name}
Repro interval
Canines count
results
protection from predators
Eyes count
Southeast Asia and islands, always hot and humid
Colors
Sex
Upcoming jubilees
Gremllins
mo
Trophic type
Filters
Captures or processes food by biting or nipping with the mouth.
young shoots and sprouts
leaves
always hot and humid, huge trees and vines
Upcoming birthdays
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
leaf
young shoots
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)
Wanderers
Hooves count
Jubilee = every 10th birthday
Canines size
Earliest developmental stage inside an egg or womb.
Business sausages
fruits
Lifespan average
nectar
leaves
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.
Pets
Indomalayan realm
Indomalayan realm
Canines color
biting
Feeding occurs primarily on land or in vegetation.
sweet nectar and flower pollen
Legs size
{name} jubilee
cm
Old-timers
Find an animal or breed...
turns
Rascals
terrestrial forest
drink mother's milk in childhood
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
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
Actively searching habitats to locate food items.
Where are they found?
Species lacks any fixed or lasting shelter structure.
from 0.8 to 1.2 kilograms, 0.6 – 1.2 meters
herbivore
Feeds by cropping or nibbling low-growing vegetation or algae.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Tropical moist forest
Elders
Bro
normal sexual
Taxons
seeds, berries, fruits
if born as {name}
Foraging takes place among trees and woody vegetation.
age
birth date
no permanent shelter
tearing
rest
Fur color
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
Neotropical realm
climbing
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
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
young shoots and leaves of plants
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
terrestrial
Plants
Gestation
Rips or shreds food using teeth, beak or claws.
land
{name} birthday
Food is gathered directly from leaf surfaces.
Always hot
No results found
Eyes color
On the map
young shoots, sprouts, green plant shoots
all life stages
Female ♀
gnaws plants
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
Maturity
terrestrial habitat, land surface outside water
sq mm
yr
Hooves color
flowers
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.
What do they eat?
Where do they live?
Hard dental structures used to bite, tear, or scrape food.
forests on land — tropical, temperate, boreal
Duration
Always hot and wet
This is me
Always very wet
Gamers
How are they built?
Hooves size
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
terrestrial
Asexual
swap
Southeast Asia and islands, always hot and humid
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
celebrated their {n} birthday
When you would have been born if you lived as {name}
very hot all year round, frequent rains, but sometimes dry
Daddies
Lifespan maximum
foraging
Hermaphrodite ⚥
embryo
Length
kg
arboreal
Observations
◉{N} more on tap