The "official" standardized English name is American Dipper.
This is what the AOU calls it.

Water Ouzel can be more properly referred to as a colloquial
name or local vernacular when used on American Dipper. Most
organisms on the planet has multiple colloquial names. Ouzel
for example means, according to "The dictionary of American
Bird Names", blackbird. It has been used colloquially for
European Blackbird and is still used for Ring Ouzel and the
European Water Ouzel (though Jonsson's "Birds of Europe" lists
list the latter as just Dipper).

As you continue to build on your experience as a birders
listen for the following colloquial bird names:

Speckle belly
Blue-bill
Mudhen
Shypoke
Buzzard
Fish hawk
Jack snipe
Goatsucker
Bee-martin

And I have every confidence that others will contribute more
now that we've started.

Subject: Question From A Beginner
From: "TipAndDick" <themartins AT tndmartin.com>
Date: Fri, 5 Aug 2005 19:08:33 -0700

Hello,

My wife and I love this new hobby; it's grown on us over the past several
years, but we feel like baby beginners. This is our first post to this list.

We stopped at Olallie State Park three days ago with the hope of seeing some
birds. We didn't see many, but we were thrilled to see an American dipper
and a barred kingfisher. It was our first time for seeing the dipper, and it
was a joy to watch. Later, a friend asked if the dipper is the same bird as
the water ouzel, and we discovered that it was.

Could someone please tell us a little more about the reason for the two
common names for the same bird?

Also, are there any folks on this list from NCW?


--
Mike Patterson
Astoria, OR
celata at pacifier.com

Beginner's Luck.... on the science and serendipity of finding stuff
http://www.surfbirds.com/blogs/mbalame/archives/002787.html