It’s a Gadwall squadron. Ducks have a species-specific color patterned speculum on their secondary wing feathers. Gadwalls have a prominent white patch with black and chestnut bordering it.
Snapshot: Gadwall
“In order to see birds it is necessary to become a part of the silence.” ― Robert Lynd
Birds in My Viewfinder 
nice flight shot Mike and detail is especially good when my glasses are on😏
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