Hybrid of Mallard and Pacific Black Duck
These hybrid ducks are the result of cross breeding (hybridisation) between introduced mallards and native Pacific Black Ducks. Most hybrid birds aren’t able to reproduce. But the problem with mallard x PBD hybrids is that they can, and so can their offspring, and so on.
They can sometimes be very easy to identify, and other times very difficult. Hybrids can look like a perfect mix of both species and have traits from both sides, or they can look almost exactly like one or the other. The most common traits in hybrids are orange legs, yellow, orange or blotchy bills, brown feathers with large brown feather edge trims and darker faces. It is very common to see ducks that look like genetically pure Black Ducks, until they start dabbling and up-end themselves, showing off a pair of bright orange legs. Hybrids are a threat to Pacific Blacks, because they migrate much further from their birthplace than feral mallards do, bringing them into contact with more pure Black Ducks, making pure Black Ducks rarer over time. Hybrids are now unfortunately the most common duck species in many parts of Tasmania.
Tips for identifying mallard x PBD hybrids. Remember any combination of these traits can occur, and characteristics can vary:
- Bright Orange legs and feet
- Lighter brown feathers
- Orange, yellow or patchy bills, or varying bill colours from the usual slate-grey
- Pale facial stripes and/or very dark faces.
- Brown streaks through the crown (top of the head)
- Curled tail feathers
- White trims on either side of the speculum (green/blue wing panel).
- Any obvious mallard traits
(Photo credit: Helen Cunningham)