Nedenstående er sakset fra Rare Birds in Spain:

Western Reef Egret Egretta gularis and presumed hybrids (1,2,3)

(1)The bird seen from 9.4 at Jose Antonio Valverde visitors centre, Aznalcazar, Sevilla breeding with a female Little Egret Egretta garzetta was still there on 6.5 (Paco Chiclana)

(2) On 4-5.5 there was a bird at charca de Maspalomas, Gran Canaria, Canary Islands (Antonio Hernández/SEO-Gran Canaria).

(3) The accepted hybrid present around Tancada lagoon, Ebre delta, Tarragona last year and this too was seen again on 24.4 (Ponç Feliu et al)

(4) At Desembocadura del Guadalhorce there was one on 7.5 (Antonio Tamayo).

Den afbillede fugl er tilsyneladende set i det samme område, hvori en hybrid slår sine folder.

En ting der generer mig ved dette billede er det tilsyneladende korte næb. Jeg er ikke klar over hvor meget variation der forekommer hos revhejre, men fra Sinai husker jeg et par fugle der passer meget godt med billedet på følgende link: http://www.leidenuniv.nl/fsw/band/Sinai/Birds/ReefHeron/nabq3_reefheron.jpg

Mvh
Niels Jørgen

Tak til Morten og Niels for kvalficeret info.

Jeg har et par kommentar og spørgsmål vedrørende "vores" fugl.
Det er sandsynligt at den er identisk med fuglen der bliver referet til som "hybrid". (Jeg formoder med "hybrid" at der her er tale om en krydsning mellem E. gularis x E. garzetta)

1) Hvilke bestemmelseskriterier er der blevet anvendt til at fastslå bestemmelsen til "hybrid"?
2) Og da jeg ikke ved særlig meget om hybrider generelt, kunne jeg godt tænke mig at vide om det er sandsynligt at en "hybrid" ville få dragtkarakter der svarer nøjagtigt til den lyseblå intermediate morph af E. gularis? De hybrider jeg har støvet op i literaturen har alle en mærkelig, spraglet blanding of hvid og mørkeblå fjer i dragten.

Forståelig nok er hele gruppen ivrig efter at få en ny VP kryds!!

Jeff - jeg synes du skal sende adressen på billederne til Ricard Gutiérrez på "Rare Birds in Spain".

Han vil utvivlsomt kunne svare på om det er den SU godkendte hybrid eller en ny fugl.

mvh

Morten

Morten,

Som sagt - så gjort.

Ricard skriver:

"We at the Spanish Rarities Committee have dealt with all known cases of hybrids or 'pure' gularis in Spain.

Structure is the key question for most birds.

There is, besides, a number of different and recurring patterns of presumed and proven hybrids. One of those is this of typical 'pale pearl' birds. There are other 'piano' birds or 'dark grey-white headed' patterns.

We have no evidence of the existance of pure gularis gularis (schistacea might be another issue but structure might be different) with bare parts matching the structure of garzetta. Neither with pale plumage such as shown. The photo bird, which by the way is already accepted by our committe as bird showing characteristics of hybrid, does show a typical structure of garzetta but with some grey tones. E.g. bill is typically pointed and head is too rounded. Besides, bill is completely black.

This is a local bird which was seen coming from a colony at Buda island in 2002 I think. We think in fact it is the brother of our 'frozen' chick which was eventually found in the same place.

Last year one gularis bred with a garzetta at Doñana heronry. And this year it is happening again, now having chicks as having been reported to my website.

Hope this helps

Ricard Gutiérrez
(just arrived from Ebro delta by the way)"

Jeg havde lige været et smut i Finland og havde ikke tid til at oploade svaret fra Ricard.