BIRDS

A SIEGE of bitterns
A FLOCK of bustards
A BROOD of chickens
A CLATTERING of choughs
A HERD of cranes
A MURDER of crows
A TEAM of ducks (flying)
A PADDLING of ducks (on a pond)
A CONVOCATION of eagles
A SKEIN of geese (flying)
A GAGGLE of geese (on a pond)
A COVEY of grouse
A CHARM of humming-birds
A BAND of jays
A DECEIT of lapwings
An EXALTATION of larks*
A FLUSH of mallards
A WATCH of nightingales
A FLOCK of parrots
A COVEY of partridges
A MUSTER or PRIDE or an OSTENTATION of peacocks
A BROOD of pheasants
A FLOCK of pigeons
A RUN of hens
A BEVY of quails
An UNKINDNESS of ravens
A CLAMOUR of rooks
A WALK of snipe
A HOST of sparrows
A CHATTERING of starlings
A MUSTERING of storks
A FLIGHT of swallows
A HERD or WEDGE of swans
A FLOCK of swifts
A FLIGHT of wigeon (flying)
A BUNCH of wigeon (on a pond)
A HERD of wrens

And - a thousand thanks to Matthew Johnson -

A PARLIAMENT of owls

*Matthew also points out that my research is disgustingly sloppy; a SLEUTH of bears should be a SLOTH. Or SLOWTH. And the larks all together are an EXAULTATION. A thousand thanks.

MAMMALS ETC

A HERD of antelope
A DROVE of asses
A SLEUTH of bears
A SOUNDER of boars
A HERD of buffaloes
A FLOCK of camels
A CLUSTER of cats
A DROVE of cattle
A HERD of chamois
A HERD of deer
A KENNEL of dogs
A HERD of elephants
A GANG of elk
A BUSINESS of ferrets
A HERD of giraffes
A HERD or FLOCK of goats
A DROVE of hares
A HERD of horses
A PACK of hounds
A LEAP of leopards
A PRIDE of lions
A NEST of mice
A TROOP of monkeys
A BARREN or RAKE of mules
A HERD or DROVE of oxen
A STRING of racehorses
A CRASH of rhinoceroses
A FLOCK of sheep
A DRAY of squirrels
A PACK of stoats
A SOUNDER of swine
A PACK of wolves

FISH ETC

A SWARM of eels
A TROOP of dogfish
A SCHOOL or SHOAL of fish
An ARMY of frogs
A GLEAN or SHOAL of herring, minnows, perch, pilchards and roach
A SCHOOL of porpoises
A HERD of seals
A KNOT of toads
A HOVER of trout
A BALE of turtles
A SCHOOL of whales
A POD of whiting

PURELY APOCRYPHAL

A CONDESCENSION of actors
An ELONGATION of anglers
A DAMPNESS of babies
A PLAUSABILITY of insurance salesmen
A DEPENDENCE of daughters
A REMOVE of dentists
An INSULARITY of Englishmen
A GESTICULATION of Frenchmen
An OFFSHOOT of gardeners
A COLUMN of journalists
A SURPLUS of lawyers
A PROCRASTINATION of plumbers
A BRAZENNESS of salesmen