australische Kasarka???

Gestart door Alcedo atthis, juni 03, 2008, 17:57:10 PM

Vorige topic - Volgende topic

Alcedo atthis

http://waarneming.nl/foto_details.php?id=24279

from this photo hybrids  Tadorna tadorna x Tadorna ferruginea are not excluded
greetings,
Jörn Lehmhus

redmar_woudstra

The "waarnemer" also stated in the comment section that the birds are most possibly hybrids.  
groet,
Redmar

Alcedo atthis

Yes, I understood that it is thought to be a possible hybrid,  but what i wanted to say was:
I think that alone  from this photo it could well be hybrids between tadorna and ferruginea, no need to involve tadornoides

compare with this tadorna x ferruginea hybrid:

http://www.flickr.com/photos/martynf65/240...ool-hybridbirds

http://www.flickr.com/photos/martynf65/240...ool-hybridbirds

http://www.flickr.com/photos/martynf65/240...ool-hybridbirds

sorry if I wasn´t clear before.
greetings,
Jörn Lehmhus

Jan Harteman

I think you might be right. Common shelduck is a common duck species (as its name says ;) ) and the Ruddy shelduck is getting more common as well, so the chance they would hybridize is much bigger than a hybrid with the Australian shelduck involved.

redmar_woudstra

Thanks Jörn, it is now more clear ;)

In that particular area Ruddy Shelducks are more common than in other parts of Holland. Strange that these hybrids look so much like the tadornoides!
groet,
Redmar

Alcedo atthis

I don´t know if this fits with experience of others , but in my experience  there is this:

In most T. tadorna x ferruginea, from breast along the flanks the colour gets lighter towards the rear end of the flanks (Breast being darkest).

In T. tadornoides the breast ist lighest (and at least in some hybrids of Tadoernoides this is similar).

(I know that different colours are involved from breast to rear flanks) I just comment on how light/ or dark colour is)
greetings,
Jörn Lehmhus