cluckmeister wrote:Fatback, go to Google Earth and type in Quivira National Wildlife Refuge, enhance the size and look at all the white that is currently showing. The picture was taken during a dry year and the white is salt deposits, this year the whole area is flooded with the water very brackish, Currently there are around 98,000 ducks on the area. So with this in mind, I would say all puddlers and divers have a very good salt tolerance.
btoups wrote:I'm no expert, but I've heard that since fresh water is lighter than salt water, even though the body of water is salty, there is some fresh or partially fresh water floating on top that they are able to drink.
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