GRC Blog

Welcome to the GRC Recorders pages. This blog provides details on all the relevant news of Glamorgan’s scarcer birds, plus all BBRC & WRP decisions that affect us locally. It will also be used to document the status and occurrence of these scarcer species and we welcome contributions from anyone with photographs, artwork or documentation of rarities past, present and future. The GRC also welcomes all seawatching news from around Glamorgan and news of passage migrants in spring & autumn, uncommon birds in our area and unusual behaviour.

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Thursday, 25 April 2013

Lisvane Reservoir Aythya

A few pics of an Aythya hybrid on Lisvane Res. It has been around since 20/4/13, but always distant from the Black Oak viewing platform and I've only just twigged that its worth a long hard look! Still present this evening. I guess its partly tufted, but opinions on the likely parents gratefully received!


Barry Stewart said...

Very difficult to say with any certainty. If I were to guess, and it would be a guess, Tufted Duck and New Zealand Scaup would probably produce something resembling this.

Paul Larkin said...

There is an illustration of TDXNZS in Eric Gillham's Hybrid Ducks publication (Eric spent his life studying duck hybrids) this has a bill pattern and shape somewhat different from this bird, it has a black nail and no pale band as this bird seems to have. Unfortunately Eric is no longer with us but, from my conversations with him, it was quite apparent that these hybrids can be very variable as to what features are expressed, but Barry's guess seems to be as good as you may get. I'll continue to look through Eric literature to see if I can come up with anything more concrete.

Phil B said...

Pinioned NZ Scaup was present not too long ago on Roath Park Lake so might support Barry's view.

Rob T said...
This comment has been removed by the author.
Rob T said...

Thanks chaps, v interesting. I also have a note of a "dark-brown flanked male tufted with green-toned head" on 6/4/2012 (the same day as the ferruginous duck!). Presumably the same bird.