Heermann's gull is a medium-sized seabird with dark gray plumage. It lives along the Pacific coast of North America and feeds on marine animals.
Heermann's gull differs from other gulls by its dark body color throughout the year. It is important for nature as a scavenger of marine coasts and part of the ocean food chain.
pecking
Worker
scraping
birth time
Submerges underwater to reach prey or food at depth.
Pelagic Ocean
Hot and almost no precipitation
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
detritus, eat dead remains of plants, animals and all kinds of organic debris on the bottom
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.
mollusks
Rasping or abrading food surfaces with teeth or mouthparts.
beak
adult
Maturity
organic debris
crabs
South and Central America, hot and humid, huge forests
Coconut
About health
marine coastal
Searches for food on or among rocks and stony surfaces.
kleptoparasitism
When your next birthday would fall if you lived as {name}
Repro interval
results
summer warm and almost no rain
aerial
summer warm, winter not very cold
Colors
Sex
very hot and almost no rain
Upcoming jubilees
Gremllins
diving
mo
Uses jaws or beak to break hard-shelled or tough food items.
live fish
rains are very rare, almost a desert
all seas and oceans
Trophic type
Filters
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
Very hot and almost dry
Age (juvenile)
Age (from birth to death)
rock
Age (embryo)
Wanderers
Food items are collected from exposed outer surfaces of substrates.
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
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
What do they look like?
Maturity
scavenging
emergence (insects)
end of lifespan
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
fish
end of acceleration
Share
live snails, mussels, oysters
Find a pet...
Mature, fully developed individual capable of reproduction.
Egg count
water is cool or warm, cold in winter, comfortable to swim in summer
Actively hunting and capturing live prey.
from 0.5 to 0.8 kilograms, 0.5 – 1 meter
where the river flows into the sea, slightly salty water, lots of fish and birds
flight
Pets
Nearctic realm
Indomalayan realm
Repeatedly strikes or probes substrate with beak to obtain food.
Feeding occurs primarily on land or in vegetation.
{name} jubilee
cm
carrion
Old-timers
Find an animal or breed...
Wingspan
Captures prey or food items while in active flight.
turns
Rascals
bird
Litter size
live crabs, shrimps, lobsters
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.
Egg color
Where are they found?
all seas and oceans
all rivers and lakes
Summer almost without rain
Down color
Locomotion through water employed while searching for or capturing prey.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Elders
Bro
Taxons
carnivore
almost no rain in summer, more precipitation in winter
if born as {name}
age
birth date
swimming
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
coastal
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
surface
foraging from the surface and on the shore
primary food sources
Temperate sea
Potential Habitat
lots of grass, few trees, rains are rare
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
islands and part of Australia, many unusual animals and plants
aquatic
{name} birthday
Nearctic realm
No results found
North America and Greenland, from tundra to forests
islands
On the map
lunge
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.
birth year
Maturity
sq mm
yr
comfortable summer, +20…+25 °C
How similar?
Egg size
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
Plumage color
River estuary into the sea
Freshwater
Very hot and dry
Duration
saline marine habitat
This is me
Warm summer with almost no rain
Steppe
freshwater
Gamers
crushing
How are they built?
marine
coastline
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?
very hot during the day, cold at night, almost no rain
Asexual
swap
freshwater environment — rivers, lakes, ponds, swamps
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?
celebrated their {n} birthday
When you would have been born if you lived as {name}
Littoral Zone
Daddies
Lifespan maximum
very hot and almost no precipitation
foraging
Capturing or collecting food while airborne.
Hermaphrodite ⚥
North America and Greenland, from tundra to forests
embryo
Hard, projecting mouthpart used to probe, pluck, or crack food.
Length
kg
Rapid forward strike to seize prey.
Bill color
Observations
◉{N} more on tap