Quote:
Originally Posted by Dutchess 
"Although easy to maintain in captivity they are usually quite quarrelsome and a mated pair will often drive off all other waterfowl and break every egg they find that is not theirs. Therefore, they should not be kept in a mixed group of fowl unless in a very large enclosure"
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that fits with what I observed at Addo Elephant park in Eastern Cape.
Only ever one pair at each water hole.