Further to the moulting Black Duck

To: 'Con Boekel' <>, 'canberrabirds chatline' <>
Subject: Further to the moulting Black Duck
From: Philip Veerman <>
Date: Sun, 7 Feb 2016 11:12:29 +0000
Hello Con,

Whilst I won't be absolute, as I don't know all details for all ducks but it is 
quite typical of ducks (some / several / most /all species - I don't know) to 
moult all their flight feathers at the same time, making them flightless for a 
while. Doing it all at once also makes the moult period shorter than the usual 
progressive moult of most birds. I was just reading about that in HANZAB today. 
The photo does show this for primary and secondary wing feathers as well as 
other areas (the alula or thumb and just general).


-----Original Message-----
From: Con Boekel 
Sent: Sunday, 7 February 2016 6:18 PM
To: canberrabirds chatline
Subject: Further to the moulting Black Duck

Earlier today I posted an image of a Black Duck which appeared to be regrowing 
feathers after moulting - probably primary and secondary wing feathers. The 
image attached is of a bird that was hanging around with the moulting duck. It 
too appears to be heavily into moult. The size of the wing seems to me to 
indicate that this particular individual is flightless. I don't really know 
whether that is correct, or not.

I have heard of some species moulting all their feathers at once and being 
flightless while doing so but I must admit it had never occurred to me that 
Black Ducks might spend part of their year being unable to fly.



Black Duck
7 February 2016
Con Boekel.

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