Deranged psychopaths, who call themselves Doctors, AKA Quacks.
All collective nouns for ducks:
brace of ducks
flock of ducks
flush of ducks
paddling of ducks
raft of ducks
team of ducks
This link will give you many including raft and flock. http://www.ask.com/pets-animals/group-ducks-called-b01f5dc2e39a782b
A group of ducks is called a flock.
Collective nouns for waterfowl when flying (including ducks, geese, coots, etc) are a skein, string, or team.A group of waterfowl in the water can be called a bunch, paddling, or raft. A group of any waterfowl can be called a plump.
A single baby duck is called a duckling, now make that plural. A group of ducks, however, is called a balding.
A group of flying squirrels is called a "Dray".
A paddling of ducks, a raft of ducks, a team of ducks, a dopping of ducks
Wild Ducks Flying Backward was created in 2005.
Wild Ducks Flying Backward has 255 pages.
A group of termites is called a colony or swarm (while flying).
The ISBN of Wild Ducks Flying Backward is 0-553-80451-0.
I do not know about a "crate" of ducks, but a group of many ducks is called a gather I think. Check out a few more answers too.
A formation.