Unusual coloured mallards.Are these hybrids?
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Not exactly. Hybrid usually means a cross between two species. These are both mallards but they will have some genetic material in from domestic 'sub-species' of mallard.
Speaking loosely you could talk about a hybrid between different sub-species if you wanted.
"manky", "heinz" or "hybrid" mallard, you'll find some good web pages with lots of examples of the promiscuity of these ducks.
Lat/Lng: 51.2, -1.5
OS grid ref: SU3546