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Soortgroepen => Wat is dit voor vogel? / Determinatie => Vogels => Hybriden => Topic gestart door: Alcedo atthis op mei 23, 2007, 13:56:05 PM

Titel: Baer's pochard or hybrid
Bericht door: Alcedo atthis op mei 23, 2007, 13:56:05 PM
http://www.flickr.com/search/?q=baer%27s+pochard&m=text (http://www.flickr.com/search/?q=baer%27s+pochard&m=text)

Aythya baeri is a species where I do not have much experience, but I am wondering is this within variation of baeri or a hybrid baeri x nyroca or something else?
Titel: Baer's pochard or hybrid
Bericht door: Jan Harteman op mei 23, 2007, 22:00:40 PM
Why would you suggest it is no Baer's pochard?

(http://www.chinabiodiversity.com/search/image/Big/b0102.jpg)
Above: Baer's pochard.

It is certainly no Ferruginous White-eye (Witoogeend)
It is no Australian White-eye (Aus. Witoogeend)
It is no Madagascar White-eye (LOL  :rolleyes: )

Just compare the bird with these Baer's pochards:

(http://www.zoothailand.org/animals/images/402_001.jpg)
Aythya baeri in Zoo Thailand

(http://homepage2.nifty.com/e-nat/akahajiro.jpg)
In Japan

(http://www.floranimal.ru/pages/animal/n/1027.jpg)
In Russia

The Baer's pochard is the only species with a green glow on its head.
All the others (Ferruginous, Australian and Madagascar) don't show this.  
Titel: Baer's pochard or hybrid
Bericht door: Alcedo atthis op mei 24, 2007, 09:06:45 AM
Hi Jan,

Green gloss , yes, but all Baers pochards I had seen so far (not many, all in captivity) had a black head with green gloss,

like the lower 2 birds on the photos you provided.

I had never before seen the reddish brown head coloration as in the bird in question and in the upper foto you provided.

So this reddish brown head is also a possibility for the coloration of male Baer´s pochard??????
Titel: Baer's pochard or hybrid
Bericht door: Jan Harteman op mei 24, 2007, 13:33:18 PM
The light colour can be seen in young males, when they get older (2nd year) it gets darker.
Titel: Baer's pochard or hybrid
Bericht door: Alcedo atthis op mei 25, 2007, 09:45:57 AM
Hi Jan ,

To me the problem is:
I would agree with young males showing a more brownish head, in coloration more similar to the female,

but this bird has a reddish brown coloration which is not mentioned in ID-features for young males (or any plumage stage for the species, eg. eclipse plumage).

I also asked birders with experience with the species in the field in east Asia; and for them this reddish brown is also odd.

Therefore I have to ask if you have bred the species yourself and know this from personal observation???


There is a clear hybrid of Baer´s pochard x Ferrugieous duck on this website, if you scroll halfway down, but that bird is very much on the ferrugieous duck side:

http://www.birdskorea.org/BLmar07.asp (http://www.birdskorea.org/BLmar07.asp)

So I am wondering how a hybrid would look that is more on the Baer´s side?

Best regards, Jörn
Titel: Baer's pochard or hybrid
Bericht door: Jan Harteman op mei 26, 2007, 18:00:39 PM
Hm, you might be right.

(I don't have breeding experience Ferruginous and Baer's pochard myself, but I have been working with them for some months as a volunteer.)
Titel: Baer's pochard or hybrid
Bericht door: Alcedo atthis op juli 23, 2007, 14:04:44 PM
This example of Baers Pochard x Ferrugineous Duck may be of interest, I hope.

http://www.orientalbirdimages.org/search.p...ult&Bird_ID=192 (http://www.orientalbirdimages.org/search.php?action=searchresult&Bird_ID=192)

http://www.orientalbirdimages.org/search.p...4ef4cc9313bba70 (http://www.orientalbirdimages.org/search.php?p=2&action=searchresult&Bird_ID=192&Bird_Family_ID=&pagesize=1&PHPSESSID=462d89fe6591004df4ef4cc9313bba70)

interesting Bird
Titel: Baer's pochard or hybrid
Bericht door: Alcedo atthis op juli 31, 2007, 12:08:54 PM
http://dogalog.excite.co.jp/viewvideo.jspx...peevee22369.flv (http://dogalog.excite.co.jp/viewvideo.jspx?Movie=48007535/48007535peevee22369.flv)

a movie of a hybrid, probably Baer´s x Ferrugineous...