The black-capped tern is a small seabird with white plumage and a black stripe on the nape. It lives in warm oceans and catches fish at the water's surface.
The dark-capped tern differs from other terns by a narrow black stripe on the nape. It is important for nature as a hunter of small fish and an indicator of the health of coastal marine ecosystems.
Worker
birth time
Submerges underwater to reach prey or food at depth.
Pelagic Ocean
Heavy rains in summer
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.
very heavy rains in summer, almost no precipitation in winter
adult
Maturity
fish of small size
South and Central America, hot and humid, huge forests
About health
marine coastal
When your next birthday would fall if you lived as {name}
pelagic biotope of coastal marine waters
Repro interval
results
Oceanian realm
aerial
Southeast Asia and islands, always hot and humid
Colors
Sex
Upcoming jubilees
Gremllins
diving
mo
hot, rains in summer, little precipitation in winter
live fish
little precipitation in winter, more in summer
all seas and oceans
Trophic type
Filters
small fish
Upcoming birthdays
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
Oceanian realm
rains almost always, very humid
Age (juvenile)
Age (from birth to death)
Hot, little precipitation in winter
Age (embryo)
Wanderers
Feeding occurs in open air space above ground or water.
Wings size
far from shore, deep water, large whales and sharks live here
world of Australasia
Jubilee = every 10th birthday
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.
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
Find a pet...
Mature, fully developed individual capable of reproduction.
Actively hunting and capturing live prey.
where the river flows into the sea, slightly salty water, lots of fish and birds
flight
65 to 130 grams, 25 – 60 centimeters
Pets
Indomalayan realm
Indomalayan realm
marine coastal pelagic
{name} jubilee
cm
Old-timers
Find an animal or breed...
Wingspan
turns
islands and part of Australia, many unusual animals and plants
Rascals
Tail color
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
Egg color
Where are they found?
all seas and oceans
all rivers and lakes
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
Taxons
carnivore
if born as {name}
age
water is almost always warm, even in winter you can swim, very hot in summer
birth date
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
The basics
Neotropical realm
My weight?
demersal biotope of coastal marine waters
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
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
Gestation
islands and part of Australia, many unusual animals and plants
aquatic
Warm sea
{name} birthday
Always hot
No results found
Hot with heavy summer rains
On the map
all life stages
Female ♀
Body 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
sq mm
yr
Beak color
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
Legs color
What if eaten?
Neither
Young offspring still dependent on parental care.
nest
What do they eat?
Where do they live?
Marine world
from birth to death
Plumage color
world of Afrotropics
River estuary into the sea
Freshwater
Duration
many islands in the Pacific Ocean, warm seas and corals
saline marine habitat
Always hot and wet
This is me
Always very wet
Gamers
hot, heavy rains in summer, little precipitation in winter
How are they built?
marine
shallow near the shore, water rises and falls, crabs live here
mm
Theoretical lifespan
ml
Stars
Link copied
coastal marine zone — shelf, neritic zone
My age?
wk
My size?
Asexual
swap
Southeast Asia and islands, always hot and humid
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?
many islands in the Pacific Ocean, warm seas and corals
Head color
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
Capturing or collecting food while airborne.
whole life
Hermaphrodite ⚥
embryo
Carrot
Length
kg
Observations
◉{N} more on tap