The black-naped tern is a medium-sized bird of the tern family. It lives on the shores of seas and lakes and catches prey both over water and on land.
The gull-billed tern differs from other terns by its sturdy straight bill and habit of hunting on land. It is important for nature because it eats many harmful insects and serves as food for predators.
Worker
Hot summer almost without rain
birth time
Hot and almost no precipitation
live adult frogs and toads
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
hot Africa south of the desert, many savannas and forests
days
South and Central America, hot and humid, huge forests
Warm summer
How old you would be if you lived as {name}
summer from pleasant to very hot
crustaceans
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.
small planktonic crustaceans — copepods, krill
adult
Maturity
fish of small size
South and Central America, hot and humid, huge forests
insects
About health
marine coastal
When your next birthday would fall if you lived as {name}
Repro interval
results
aerial
summer warm, winter not very cold
Southeast Asia and islands, always hot and humid
Colors
Sex
Upcoming jubilees
Gremllins
mo
hot, rains in summer, little precipitation in winter
live fish
rains are very rare, almost a desert
little precipitation in winter, more in summer
all seas and oceans
Trophic type
Filters
small fish
Warm or hot summer
Palearctic realm
Upcoming birthdays
standing fresh waters — lakes, ponds, oxbow lakes
Breeding structure built or used for laying eggs and raising offspring.
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)
Hot, little precipitation in winter
Age (embryo)
most of Europe and Asia, various forests, steppes and tundra
Wanderers
Food items are collected from exposed outer surfaces of substrates.
Feeding occurs in open air space above ground or water.
Wings size
world of Australasia
Jubilee = every 10th birthday
Warm summer and frequent rains
marine coastal demersal
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
young after fast growth
Juvenile stage following larval metamorphosis but not yet adult.
summer warm, rains frequent
What do they look like?
Maturity
emergence (insects)
end of lifespan
Wings color
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
fish
end of acceleration
Share
swampy freshwater biotopes — peat bogs, marshes, river mangroves
Find a pet...
Mature, fully developed individual capable of reproduction.
water is cool or warm, cold in winter, comfortable to swim in summer
Actively hunting and capturing live prey.
where the river flows into the sea, slightly salty water, lots of fish and birds
flight
Pets
Indomalayan realm
Nearctic realm
Indomalayan realm
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
islands and part of Australia, many unusual animals and plants
Rascals
hot Africa south of the desert, many savannas and forests
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
Actively searching habitats to locate food items.
Where are they found?
all rivers and lakes
Summer almost without rain
Down color
Low precipitation in winter
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Elders
Bro
lakes and ponds
freshwater marsh and wetlands
Taxons
carnivore
almost no rain in summer, more precipitation in winter
if born as {name}
age
water is almost always warm, even in winter you can swim, very hot in summer
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
Neotropical realm
My weight?
demersal biotope of coastal marine waters
summer is hot and almost no rain falls
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
surface
primary food sources
Neotropical realm
Temperate sea
Beak size
after transformation until death
Potential Habitat
lots of grass, few trees, rains are rare
Very hot summer
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
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
islands and part of Australia, many unusual animals and plants
aquatic
summer very hot, above +25…+30 °C
Warm sea
{name} birthday
Nearctic realm
Always hot
No results found
North America and Greenland, from tundra to forests
On the map
all life stages
Female ♀
world of Afrotropics
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
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?
Very dry
Neither
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.
Marine world
from birth to death
Plumage color
world of Afrotropics
River estuary into the sea
Freshwater
Duration
live insects
saline marine habitat
This is me
most of Europe and Asia, various forests, steppes and tundra
Steppe
freshwater
Always very wet
Gamers
How are they built?
marine
shallow near the shore, water rises and falls, crabs live here
live lizards
frogs and toads
mm
Theoretical lifespan
ml
Stars
Link copied
coastal marine zone — shelf, neritic zone
My age?
wk
My size?
terrestrial
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
gathering prey from the water surface and land as well as catching in flight
Southeast Asia and islands, always hot and humid
active predation
lizards
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}
very hot all year round, frequent rains, but sometimes dry
Littoral Zone
Daddies
Lifespan maximum
world of Australasia
very hot and almost no precipitation
foraging
Capturing or collecting food while airborne.
whole life
Hermaphrodite ⚥
North America and Greenland, from tundra to forests
embryo
Zucchini
Length
kg
Observations
◉{N} more on tap