The willow ptarmigan is a bird from the grouse family. It lives in cold tundras and mountains and changes its feather color by seasons for camouflage.
The willow ptarmigan differs from the white ptarmigan by a black stripe on the males' faces and a love for rocky slopes. It serves as food for tundra predators and helps plants spread seeds.
Immature form that undergoes metamorphosis before adulthood.
pecking
Worker
birth time
very cold, short summer, lots of moss
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
Polar tundra
t
When your next jubilee falls in {name} life years
Human
very cold, short summer, almost no trees, lots of moss
days
Warm summer
How old you would be if you lived as {name}
nips and pecks at plants
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.
beak
adult
Maturity
plant
invertebrates
About health
When your next birthday would fall if you lived as {name}
Repro interval
results
land coast flooded by tides — salt marshes, littoral zone
summer warm, winter not very cold
Colors
Cool summer
Sex
Upcoming jubilees
Gremllins
mo
Uses an excavated underground tunnel or chamber for refuge or nesting.
conifer cones
alpine meadows and arctic tundra on land
Trophic type
all living animals without backbone
Filters
plant buds
Palearctic realm
Upcoming birthdays
Breeding structure built or used for laying eggs and raising offspring.
Winter with snow
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
rains almost always, very humid
Age (juvenile)
Age (from birth to death)
cones of coniferous trees with seeds
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
Jubilee = every 10th birthday
berries
Tundra
Earliest developmental stage inside an egg or womb.
Business sausages
fruits
Lifespan average
nectar
leaves
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
Supraorbital comb size
end of acceleration
Share
Find a pet...
Mature, fully developed individual capable of reproduction.
very cold, lots of snow and ice
Pets
Nearctic realm
Repeatedly strikes or probes substrate with beak to obtain food.
juicy berries — bilberry, rowan, rosehip
Lots of rain and cool summer
Feeding occurs primarily on land or in vegetation.
sweet nectar and flower pollen
{name} jubilee
cm
Old-timers
Find an animal or breed...
Wingspan
turns
Rascals
terrestrial forest
terrestrial intertidal
Flooded grasslands
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
alpine and arctic tundra
Actively searching habitats to locate food items.
Where are they found?
herbivore
lots of rain, cool summer, snow in winter
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
Elders
Bro
Very cold
Taxons
seeds, berries, fruits
if born as {name}
cold, short summer, almost no trees
age
Supraorbital comb color
birth date
Palearctic realm
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
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
burrow
Beak size
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
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
Gestation
from 130 grams to 0.5 kilograms, 0.35 – 0.8 meters
{name} birthday
Nearctic realm
No results found
North America and Greenland, from tundra to forests
On the map
all life stages
Female ♀
Down feathers color
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
Beak color
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
Legs color
What if eaten?
Neither
from birth to adulthood
Young offspring still dependent on parental care.
nest
What do they eat?
Where do they live?
unopened buds and plant buds
Immature individual that has not yet reached reproductive maturity.
from birth to death
much snow in winter, cold
early young
Plumage color
forests on land — tropical, temperate, boreal
water often floods the land, lots of grass
small insects
Duration
This is me
most of Europe and Asia, various forests, steppes and tundra
Always very wet
Gamers
How are they built?
small insects without further specification
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
terrestrial
Taiga
Asexual
swap
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?
celebrated their {n} birthday
When you would have been born if you lived as {name}
Daddies
Lifespan maximum
foraging
whole life
Hermaphrodite ⚥
North America and Greenland, from tundra to forests
embryo
Hard, projecting mouthpart used to probe, pluck, or crack food.
Zucchini
Length
kg
Observations
◉{N} more on tap