Geavanceerd zoeken  

Nieuws:

Pagina's: [1]   Omlaag

Auteur Topic: Baer's pochard or hybrid  (gelezen 325 keer)

0 leden en 1 gast bekijken dit topic.

Alcedo atthis

  • Admins
  • Offline Offline
  • Berichten: 783
Baer's pochard or hybrid
« Gepost op: mei 23, 2007, 13:56:05 pm »

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?
« Laatst bewerkt op: mei 23, 2007, 13:56:19 pm door Alcedo atthis »
Gelogd
greetings,
Jörn Lehmhus

Jan Harteman

  • Member
  • Offline Offline
  • Berichten: 1838
    • Harteman Wildfowl
Baer's pochard or hybrid
« Reactie #1 Gepost op: mei 23, 2007, 22:00:40 pm »

Why would you suggest it is no Baer's pochard?


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:


Aythya baeri in Zoo Thailand


In Japan


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.  
« Laatst bewerkt op: mei 23, 2007, 22:02:27 pm door Jan Harteman »
Gelogd

Alcedo atthis

  • Admins
  • Offline Offline
  • Berichten: 783
Baer's pochard or hybrid
« Reactie #2 Gepost 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??????
Gelogd
greetings,
Jörn Lehmhus

Jan Harteman

  • Member
  • Offline Offline
  • Berichten: 1838
    • Harteman Wildfowl
Baer's pochard or hybrid
« Reactie #3 Gepost 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.

Alcedo atthis

  • Admins
  • Offline Offline
  • Berichten: 783
Baer's pochard or hybrid
« Reactie #4 Gepost 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

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

Best regards, Jörn
Gelogd
greetings,
Jörn Lehmhus

Jan Harteman

  • Member
  • Offline Offline
  • Berichten: 1838
    • Harteman Wildfowl
Baer's pochard or hybrid
« Reactie #5 Gepost 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.)

Alcedo atthis

  • Admins
  • Offline Offline
  • Berichten: 783
Baer's pochard or hybrid
« Reactie #6 Gepost 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.p...4ef4cc9313bba70

interesting Bird
Gelogd
greetings,
Jörn Lehmhus

Alcedo atthis

  • Admins
  • Offline Offline
  • Berichten: 783
Baer's pochard or hybrid
« Reactie #7 Gepost op: juli 31, 2007, 12:08:54 pm »

http://dogalog.excite.co.jp/viewvideo.jspx...peevee22369.flv

a movie of a hybrid, probably Baer´s x Ferrugineous...
Gelogd
greetings,
Jörn Lehmhus
Pagina's: [1]   Omhoog
 

Pagina opgebouwd in 0.047 seconden met 19 queries.