A Parliament of Owls

An adultery of snails
An ambush of widows
An armada of ships
A banter of racists
A bed of oysters
A belittlement of prawn
A betrayal of pencils
A blessing of unicorns
A brouhaha of clams
A business of flies
A carnival of invalids
A cast of actors
A cete of badgers
A coven of witches
A culture of bacteria
A deceit of pandas
A disappointment of rainbows
A farce of giraffe
A flight of stairs
A flirtation of crabs
A gaggle of geese (walking)
A gam of whales
A harbinger of kittens
A host of angels
An idiocy of (mounted) horses
An inconvenience of scorpions
An intercourse of daffodils
A knot of frogs
A labour of moles
A library of babies
A malarkey of midwives
A matrimony of gorilla
A mincing of sharks
A murder of crows
A nemesis of dolphins (when out of water)
An observance of hermits
A pantheon of gods
A parliament of owls
A piteousness of doves
A pod of dolphins (when in water)
A pride of lions
A puff of weasels
A repression of beavers
A rigmarole of hens
A route of wolves
A sea of bishops
A secrecy of swans (when dead)
A sentencing of neighbours
A shower of lizards
A shrewdness of apes
A singular of boar (less than 12)
A skein of geese (flying)
A smack of nuns
A sounder of boar (12 or more)
A sprinkling of bear-cubs
An unkindness of ravens
A wedge of geese (flying in a V)
A welding of Americans

A Smack of Nuns