Hi Roger,
I would suspect you are correct. From the photo I can't tell. The feather sticking up in the lower photo
looks like an out of place secondary, not a primary feather.
Just one point for clarification
though. You wrote: "The wings seemed to be about half the length I would
expect for an adult bird." The question arises as to whether you are comparing
the wing length to what you would expect for an adult duck of some other similar
sized species or what you would expect for an adult Musk Duck. The point being
that adult Musk Ducks do have very short wings. So the wings may be
very short which is quite ordinary for adult Musk Ducks. Another aspect is
do Musk Ducks moult all their wing feathers simultaneously? Many ducks do
and this one seems a likely one to do so. HANZAB probably tells us all that
stuff.
Philip
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