Mammals and marsupials
Apes: a shrewdness
Badgers: a cete
Bats: a cauldron
Bears: a sloth or sleuth
Buffalo: a gang or obstinacy
Cats: a clowder, pounce or glaring; for kittens: a kindle, litter or intrigue
Dogs: a litter (puppies), pack (wild) or cowardice (curs)
Donkeys: a pace
Elephants: a parade
Elk: a gang
Ferrets: a business
Fox: a leash, skulk or earth
Giraffes: a tower
Goats: a tribe or trip
Gorillas: a band
Hippopotamuses: a bloat or thunder
Hyenas: a cackle
Jaguars: a shadow
Kangaroos: a troop or mob
Lemurs: a conspiracy
Leopards: a leap
Lions: a pride or sawt
Martens: a richness
Moles: a labor
Monkeys: a troop or barrel
Mules: a pack, span or barren
Otters: a romp
Pigs: a drift, drove, sounder, team or passel
Porcupines: a prickle
Porpoises: a pod, school, herd or turmoil
Rabbits: a colony, warren, nest, down, husk or herd (domestic only)
Rhinoceroses: a crash
Squirrels: a dray or scurry
Tigers: an ambush or streak
Whales: a pod, gam or herd
Wolves: a pack, rout or route (when in movement

Birds

Bitterns: a sedge
Buzzards: a wake
Bobolinks: a chain
Coots: a cover
Cormorants: a gulp
Crows: a murder or horde
Dotterel: a trip
Doves: a dule or pitying (specific to turtle doves)
Ducks: a brace, team, flock (in flight), raft (on water), paddling or badling
Eagles: a convocation
Finches: a charm
Flamingos: a stand
Geese: a flock, gaggle (on the ground) or skein (in flight)
Grouse: a pack (in late season)
Hawks: a cast, kettle (in flight) or boil (two or more spiraling in air)
Herons: a sedge or siege
Jays: a party or scold
Lapwings: a deceit
Larks: an exaltation
Mallards: a sord (in flight) or brace
Magpies: a tiding, gulp, murder or charm
Nightingales: a watch
Owls: a parliament
Parrots: a pandemonium or company
Partridge: a covey
Peafowl: an ostentation or muster
Penguins: a colony, muster, parcel or rookery
Pheasant: a nest, nide (a brood), nye or bouquet
Plovers: a congregation or wing (in flight)
Ptarmigans: a covey
Rooks: a building
Quail: a bevy or covey
Ravens: an unkindness
Snipe: a walk or wisp
Sparrows: a host
Starlings: a murmuration
Storks: a mustering
Swans: a bevy, game or wedge (in flight)
Teal: a spring
Turkeys: a rafter or gang
Woodcocks: a fall
Woodpeckers: a descent

Reptiles and amphibians

Cobras: a quiver
Crocodiles: a bask
Frogs: an army
Toads: a knot
Turtles: a bale or nest
Salamanders: a maelstrom
Snakes, vipers: a nest

Fish
Fish in general: a draft, nest, run, school or shoal
Herring: an army
Sharks: a shiver
Trout: a hover

Invertebrates
Bees: a grist, hive or swarm
Caterpillars: an army
Clams: a bed
Crabs: a consortiums
Cockroaches: an intrusion
Flies: a business
Grasshoppers: a cloud
Jellyfish: a bloom, fluther or smack
Lobsters: a risk
Oysters: a bed
Snails: a hood
Squid: an audience