A group of deer is a herd, a group of wolves is a pack, a group of owls is a parliament, and a group of crows is — really — a murder. Collective nouns are one of the English language’s best games, split between everyday working words that scientists actually use (herd, pack, flock, school, colony) and gloriously odd ones invented centuries ago (a shrewdness of apes, a crash of rhinos). This guide collects the full list in one table, explains which terms are real working vocabulary and which are for fun, and covers the group names behind the animals we know best.
The big list of animal group names
| Animal | Group name | Everyday or fanciful? |
|---|---|---|
| Deer | Herd | Everyday — the standard term |
| Elk | Herd (a gang, in old usage) | Herd is standard |
| Moose | Herd | Though moose are usually loners |
| Wolves | Pack | Everyday — used by biologists |
| Lions | Pride | Everyday — used by biologists |
| Fish | School or shoal | Everyday |
| Birds (general) | Flock | Everyday |
| Bats / ants / bees / penguins | Colony | Everyday |
| Whales / dolphins | Pod | Everyday |
| Owls | Parliament | Fanciful — and beloved |
| Crows | Murder | Fanciful |
| Ravens | Unkindness (or conspiracy) | Fanciful |
| Geese | Gaggle (ground); skein (in flight) | Traditional, still used |
| Rhinos | Crash | Fanciful |
| Giraffes | Tower | Fanciful |
| Zebras | Dazzle (or herd) | Fanciful |
| Hippos | Bloat | Fanciful |
| Otters | Romp (raft, in water) | Fanciful, weirdly accurate |
| Ferrets | Business | Fanciful |
| Porcupines | Prickle | Fanciful |
| Hedgehogs | Array (or prickle) | Fanciful — hedgehogs are loners anyway |
| Kangaroos | Mob (or troop) | Everyday in Australia |
| Monkeys / gorillas | Troop | Everyday — gorillas also live in bands |
| Lemurs | Conspiracy | Fanciful |
| Tigers | Ambush (or streak) | Fanciful — tigers are solitary |
| Bears | Sloth (or sleuth) | Fanciful — bears rarely group at all |
| Foxes | Skulk (or leash) | Fanciful |
| Squirrels | Scurry (or dray) | Fanciful |
| Rabbits | Colony (a fluffle, informally) | Colony is the working term |
| Pigs / wild boar | Sounder | Traditional, used by hunters |
| Hyenas | Clan (or cackle) | Clan is used by biologists |
| Frogs | Army | Fanciful |
| Toads | Knot | Fanciful |
| Jellyfish | Smack (or bloom) | Bloom is the scientific term |
| Flamingos | Flamboyance (or colony) | Fanciful — colony in science |
| Eagles | Convocation | Fanciful |
Where the weird ones came from
The fanciful terms mostly trace to late-medieval England, and above all to The Book of St Albans (1486), which printed long lists of “terms of venery” — hunting-party vocabulary that noblemen were expected to know. Some were practical, but many were jokes and wordplay from the start: a superfluity of nuns and a doctrine of doctors appear on the same lists as the shrewdness of apes. Nobody in the 15th century solemnly used “a murder of crows” in the field; it was table wit, and it was meant to be.
That’s the honest answer to whether these terms are “real”: they’re real words with real history, and dictionaries record them, but a wildlife biologist writing a paper will say a flock of crows and a colony of flamingos. The fanciful terms live on because they’re irresistible — and because writers, teachers, and trivia hosts keep them in circulation. Use them for delight, not for precision.
The group names that do real work
The everyday terms, on the other hand, describe genuine social structures. A deer herd isn’t a random crowd: for most of the year, does live in family groups of related females and fawns while bucks form separate bachelor groups, and the groups merge and swell in winter. Our guides to how many deer are in a herd and what to call a group of deer break down how those groups actually form and change with the seasons.
A wolf pack is a family — typically a breeding pair plus their offspring from the past few years. Most packs number four to ten, as we cover in how many wolves are in a pack and the social structure of a wolf pack — and the popular “alpha wolf” idea is largely outdated: the leaders are simply the parents. A bat colony can be the largest mammal gathering on Earth — Bracken Cave in Texas shelters millions of free-tailed bats, and bats roost together for warmth, safety, and information-sharing. A gorilla troop, led by a silverback, is a stable family that can stay together for decades; see what a group of gorillas is called for how those bands work.
Groups in the deer’s world
Around deer country, the working vocabulary is short and useful. Deer, elk, and caribou form herds — caribou super-herds in the Arctic can number in the tens of thousands during migration, among the largest land-mammal gatherings anywhere. Moose are the family’s loners; you’ll mostly meet the collective noun for moose in trivia, as a group of moose is rarely seen outside a good winter feeding area. As for the smaller neighbors: squirrel groups are scurries or drays, rabbit groups are colonies (or, informally and adorably, fluffles), and bat groups are colonies, cauldrons, or — in flight — clouds.
Why animals group up at all
Collective nouns are wordplay, but the groups themselves are survival strategies, and different pressures build different groups. Prey animals gather for shared vigilance — a herd of deer is many ears and noses on one problem, and deer travel in groups precisely because a predator can’t surprise forty eyes at once. Predators group to tackle bigger prey: a wolf pack can pull down an elk no single wolf could handle. Colonies trade warmth and information — a winter bat cluster can hold its cave-roost temperature degrees above the surrounding rock. And some groups are pure geography: a “bloat” of hippos is mostly animals sharing the last good pool in the dry season, tolerating each other because the alternative is worse.
Group size follows the strategy. Solitary hunters like tigers and moose meet mainly to breed; family bands like wolf packs and gorilla troops hold steady at a handful to a dozen; open-country grazers and colonial breeders scale into the thousands and millions, where sheer arithmetic protects each individual. When you learn a species’ collective noun, you’re often learning its whole social life in one word — or learning, from a term like an “ambush” of tigers, that a 15th-century wit knew perfectly well tigers never gather, and named the group for the only way you’d ever meet one.
Favorites to memorize for trivia night
- A parliament of owls — solemn, feathered, allegedly wise.
- A murder of crows and an unkindness of ravens — the corvids got the gothic ones.
- A crash of rhinos — exactly what it would be.
- A tower of giraffes and a dazzle of zebras — the savanna’s poets.
- A bloat of hippos — rude but fair.
- A prickle of porcupines — try to say it without smiling.
- A flamboyance of flamingos — self-explanatory.
- A conspiracy of lemurs — all those sideways glances.
- A business of ferrets — constantly busy, rarely productive.
- A fluffle of rabbits — informal, modern, and irresistible.
If you want a system rather than a list: the everyday terms sort by habitat and movement. Land grazers form herds; things that fly form flocks (or a gaggle walking and a skein flying, for geese); fish form schools; social insects, seabirds, bats, and rabbits form colonies; marine mammals form pods; and cooperative hunters form packs. Learn those six and you can name the group of almost any animal on Earth correctly — then deploy “parliament” and “murder” purely for style points.
One last twist: some animals belong to different groups at different moments. Geese are the classic case — a gaggle on the ground, a skein in flight — but flamingos flip between a colony (breeding) and a flamboyance (any time a writer can get away with it), otters between a romp on land and a raft in the water, and bats between a colony at roost and a cloud on the wing. The vocabulary tracks behavior, which is a hint that people who coined the working terms were watching real animals do real things.
Frequently asked questions
What is a group of owls really called?
A parliament — in tradition and trivia. The term was popularized in modern times (C.S. Lewis used a “Parliament of Owls” in Narnia, echoing a medieval poem about a parliament of birds), and it stuck because owls look so judicial. Scientists studying owls, though, mostly say a group or flock, since owls rarely gather at all.
Why is a group of crows called a murder?
It’s a piece of medieval wordplay, probably inspired by crows’ black plumage, their croaking calls, and their habit of gathering at carcasses and gallows. It appears in 15th-century word lists alongside dozens of other invented terms. Crow scientists say “flock” — but they know the word, and most of them love it too.
What’s the biggest animal group in the world?
By sheer numbers in one place, insect swarms win: a single desert locust swarm can contain billions. Among mammals, the migrating caribou herds of the Arctic and the free-tailed bat colonies of Texas — millions of bats under one cave roof — are the record-holders. A herd of a few dozen deer in a winter field is cozy by comparison.
Do the animals know they’re in a group?
Very much so, for the working groups. Wolves know every member of their pack personally; gorilla troops have stable relationships and rank; dolphin pods call each other by signature whistles. Fancifully named groups are another matter — a “parliament” of owls is usually just several owls who’d rather be alone.
More animal words and wonders: learn every baby animal name from fawn to puggle, meet the pack-hunters in depth in our complete wolves hub, explore colony life in the bats guide, or browse all 263 species in the Animals A–Z index.
