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Green-winged Teal Anas carolinensis and presumed hybrids Green-winged x Eurasian Teal Anas carolinensis x crecca in N Spain: part II

Photos and comments by Ricard Gutiérrez. Drawings by Gorka Gorospe

The Aiguamolls de l'Empordà presumed hybrid male carolinensis x crecca

The bird was also found by Jordi Martí on 6.3 afternoon. 

The bird looked exactly builded like nearby crecca. In fact, the only feature recalling carolinensis was perhaps the white line of the flanks which, in turn, was narrower than that of the pure carolinensis. Note also that the breast of this birds had a white 'basal' tinge instead of the pinkish tone of the pure male (compare the below photos with the thumbnail on the right or the previous page on these birds).

Photographs

All photos depicting presumed hybrid male Green-winged Teal Anas carolinensis x crecca. Also other pure Anas crecca featured.  All photos by Ricard Gutiérrez, El Cortalet lagoon, PN Aiguamolls de l'Empordà, 7.3.2002 using Agfa e-photo 1680 attached to Kowa TSN824 telescope. 

The bird from Balsa de Zolina, Navarra, on february 2002

Last 24.2.2002, Gorka Gorospe, also from the CR/SEO, found one migrant teal which also featured carolinensis features: the white flank line and a reduced white line in the head, only present in the lower part of the green mask, breast with buff basis (richer than in the Aiguamolls bird, see above). It also featured the white line of the crecca species but, perhaps somewhat narrower than that of the typical crecca found nearby (see drawing below)

Presumed hybrid crecca x carolinensis. Navarra.22.2.02. Click on the image for a larger version with comments in Spanish (opens in another window)
Discussion

The bibliography mentions teals showing mixed characters crecca x carolinensis , e.g Vinicombe, KE 1994 British Birds, 87:88-89 who also quotes Palmer, R (ed) 1976 Handbook of North American Birds, vol.2 but few information on these birds appears to exist at least in Spain (CR/SEO archives), probably all over Europe. Being the reported birds northboung migrants it is clear that they will turn up in a central or north Europe country given the origin of wintering crecca populations in Spain (Díaz et al 1996). Interestingly, the Aiguamolls bird seemed to belong to the same migrant party that the displaying male carolinensis and could even form part of the same family. With the number of carolinensis reaching Europe now, it is possible that future cases such as these will appear in the following years.


Part I: the pure male  Anas carolinensis



Thanks to Jordi Martí, the responsable of bird monitoring in PN Aiguamolls de l'Empordà and an entusiastic collaborator with this page. Without his phone-calling neither the observation nor these photos nor claryfing a little more the status of the intermediate birds could have been possible ('cuidadín').... Gracias a Jordi Martí, el responsable del seguimiento de las aves del PN Aiguamolls de l'Empordà y un entusiasta seguidor y colaborador de esta web. Sin su llamada telefónica no hubiese habido ni observación ni fotos ni tampoco hubiesemos aclarado este tema de las aves intermedias tan rápido. Gràcies ('què passssssha') a Jordi Martí, el responsable del seguiment dels ocells del PN Aiguamolls de l'Empordà que com sabeu és un entusiasta seguidor i col·laborador d'aquesta web (queda pendent el tema dinar :-) ). Sense la seva trucada molta gent no hauria bimbat ni hi hauria fotografies ni tampoc s'hagués aclarit el tema dels ocells d'apariència intermèdia (si més no tan ràpid). Gràcies.

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Green-winged Teal Anas carolinensis and presumed hybrids Green-winged x Eurasian Teal Anas carolinensis x crecca in N Spain: II

Summary:

The Aiguamolls de l'Empordà presumed hybrid male carolinensis x crecca
Photographs
The bird from Balsa de Zolina, Navarra, on february 2002
Discussion
Acknowledgements


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