The willow warbler is a small migratory bird about 11 centimeters long. Every spring, it arrives in the forests and shrubs of northern Europe and Asia to raise its chicks and flies to Africa in the fall.
The willow warbler differs from the similar chiffchaff with longer wings and a special song resembling a descending trill. It is important for the forest because it eats a large number of pest insects.
meadows, prairies, forb glades on land
Worker
Tail size
birth time
Picking small food items from foliage, ground, or other surfaces.
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
Legs count
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 bird
Maturity
plant
invertebrates
insects
About health
When your next birthday would fall if you lived as {name}
Repro interval
results
aerial
summer warm, winter not very cold
Colors
Cool summer
Sex
Upcoming jubilees
Gremllins
mo
alpine meadows and arctic tundra on land
Trophic type
all living animals without backbone
Filters
Tail count
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
leaf
rains almost always, very humid
Age (juvenile)
Age (from birth to death)
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
Feeding occurs in open air space above ground or water.
Wings size
Jubilee = every 10th birthday
More:
small invertebrates without further specification
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
fledgling
Juvenile stage following larval metamorphosis but not yet adult.
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
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Find a pet...
Mature, fully developed individual capable of reproduction.
gleaning
Actively hunting and capturing live prey.
flight
Pets
Lots of rain and cool summer
Feeding occurs primarily on land or in vegetation.
Legs size
{name} jubilee
cm
Old-timers
Find an animal or breed...
Wingspan
Captures prey or food items while in active flight.
turns
Rascals
terrestrial forest
terrestrial herbaceous
Tail color
Flooded grasslands
insect
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
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
Share
alpine and arctic tundra
Actively searching habitats to locate food items.
Where are they found?
Down color
lots of rain, cool summer, snow in winter
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Elders
small invertebrates
Bro
Taxons
carnivore
if born as {name}
Foraging takes place among trees and woody vegetation.
Wings count
age
foraging for prey on leaves and aerial catching
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
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
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
lots of rain, summer not hot
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
terrestrial
Gestation
{name} birthday
Food is gathered directly from leaf surfaces.
Link copied
No results found
caterpillars
On the map
Pleasant summer
all life stages
Female ♀
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.
Beak count
birth year
Maturity
terrestrial habitat, land surface outside water
sq mm
yr
Beak color
comfortable summer, +20…+25 °C
How similar?
Male ♂
until the celebration
chick
hawking
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?
spiders
Neither
Moving up vertical surfaces like trunks or rocks to reach food.
butterfly and moth caterpillars
from birth to adulthood
Young offspring still dependent on parental care.
nest
What do they eat?
Where do they live?
Immature individual that has not yet reached reproductive maturity.
from birth to death
much snow in winter, cold
Plumage color
forests on land — tropical, temperate, boreal
water often floods the land, lots of grass
branch
Temperate mixed forest
Duration
live insects
This is me
most of Europe and Asia, various forests, steppes and tundra
from 11 to 16 grams, 1.5 – 12 centimeters
Always very wet
Gamers
How are they built?
Cool summer and lots of rain
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
live spiders — arachnids of all sizes
terrestrial
Taiga
Asexual
swap
active predation
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
celebrated their {n} birthday
When you would have been born if you lived as {name}
Daddies
Lifespan maximum
foraging
Capturing or collecting food while airborne.
whole life
Hermaphrodite ⚥
Strawberry
egg
summer warm, many oaks, birches, maples
Length
kg
lots of rain, warm and pleasant summer
arboreal
Observations
◉{N} more on tap
chick
pupa
imago
young bird