Egrets

So what do you call a whole bunch of egrets? 

I have found,

A bevy of quail
A bouquet of pheasants [when flushed]
A brood of hens
A building of rooks
A cast of hawks [or falcons]
A charm of finches
A colony of penguins
A company of parrots
A congregation of plovers
A cover of coots
A covey of partridges [or grouse or ptarmigans]
A deceit of lapwings
A descent of woodpeckers
A dissimulation of birds
A dole of doves
An exaltation of larks
A fall of woodcocks
A flight of swallows [or doves, goshawks, or cormorants]
A gaggle of geese [wild or domesticated]
A host of sparrows
A kettle of hawks [riding a thermal]
A murmuration of starlings
A murder of crows
A muster of storks
A nye of pheasants [on the ground]
An ostentation of peacocks
A paddling of ducks [on the water]
A parliament of owls
A party of jays
A peep of chickens
A pitying of turtledoves
A raft of ducks
A rafter of turkeys
A siege of herons
A skein of geese [in flight]
A sord of mallards
A spring of teal
A tidings of magpies
A trip of dotterel
An unkindness of ravens
A watch of nightingales
A wedge of swans [or geese, flying in a "V"]
A wisp of snipe

But, I have found no mention of such a name for a group of egrets.  A siege of herons is close.  But no cigar.  So I guess its up to us.  An ostentation of peacocks is a good model to use.  How about a watch of egrets (been used)?  Or, an aloftness of egrets.   Or, a watchful of egrets.  hmmmmmmmmmmmmmm  a watchful of egrets is pretty good!

Gordon et. al.