ants: colony
bears: sleuth, sloth
bees: grist, hive, swarm
birds: flight, volery
cattle: drove
cats: clutter, clowder
chicks: brood, clutch
clams: bed
cranes: sedge, seige
crows: murder
doves: dule
ducks: brace, team
elephants: herd
elks: gang
finches: charm
fish: school, shoal, draught
foxes: leash, skulk
geese: flock, gaggle, skein
gnats: cloud, horde
goats: trip
gorillas: band
hares: down, husk
hawks: cast
hens: brood
hogs: drift
horses: pair, team
hounds: cry, mute, pack
kangaroos: troop
kittens: kindle, litter
larks: exaltation
lions: pride
locusts: plague
magpies: tidings
mules: span
nightingales: watch
oxen: yoke
oysters: bed
parrots: company
partridges: covey
peacocks: muster, ostentation
pheasants: nest, bouquet
pigs: litter
ponies: string
quail: bevy, covey
rabbits: nest
seals: pod
sheep: drove, flock
sparrows: host
storks: mustering
swans: bevy, wedge
swine: sounder
toads: knot
turkeys: rafter
turtles: bale
vipers: nest
whales: gam, pod
wolves: pack, route
woodcocks: fall

Here are two favorites....a smack of jellyfish and a leap of leopards!

I always thought a "murder of crows" was spot on, they are horrible birds.