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Bird Photos: Escapees: Black-bellied Whistling-Duck

This Black-bellied Whistling-Duck was originally reported by Caroline Nabeta on 10/16/03 at the Ridgemark Golf Course in Hollister, CA. The identification was confirmed by Mark Paxton the same day. I took these photos on 11/12/03. Caroline later found and spoke with the person who owns this duck. It apparently had a mate, but she died. It flies freely to and from its home.

 

   
   
 

This Black-bellied Whistling-Duck was seen in the company of Mallards, Mallard X ? hybrids, two Mute Swans, two Black Swans and several domestic geese. This bird sought the relative safety of the group of birds, but didn't appear to relate to them very closely, often maintaining some distance from them. While it didn't allow me to get too close, it was reported to approach some golfers along with the other waterfowl. There are human residents at this combination golf course and residential community who feed the waterfowl.

   
 

The species has not yet been accepted as a naturally occurring wild bird in Northern California. Sightings from this part of the State are usually considered to be of escapees from a live collection of birds. It can be seen that the right hallux (hind toe) has been cut off, a sign of captivity.

   
 

The left hallux was intact and it had no leg bands, nor were the wings pinioned (clipped), as can be seen in this and the following full images. It could fly very well and it did seem to leave the area for a nearly a month. The unclipped flight feathers are probably a result from it's pre-basic molt, which it should have just completed. Because of the timing of the molt, at this time, it would be difficult to know if the flight feathers were pinioned prior to this molt.

   
 

No leg bands, all of the flight feathers appear to be present, but see the enlargement of the toes, below. It should be noted that even in the absence of these evidence of captivity, one should not automatically assume that a bird like this is of wild origin.

   
 

Here's a detail of the above image. You may be able to see the stub of the right hallux and the whole left hallux. It is possible that the bird could have lost this appendage in the wild.

   
 

It could fly very easily. All the flight feathers seem intact and unpinioned.

   
 

Another flight shot.

   
 

Here's a detail of the above image. Again, you may be able to see the stub of the right hallux and the whole left hallux.

 

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