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Rare Birds in Spain

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Breeding Orange-billed terns in Catalonia, July 2003. 

Photos by David Bigas i Campàs 

Introduction

The Ebre Delta (Delta del Ebro in Spanish, Delta de l'Ebre in Catalan) is the only regular place in Spain where Lesser-crested Tern Sterna bengalensis breeds. In past times it had bred in l'Albufera de València where, as in the case of the Ebre delta, depending on years, hybrid pairs with Sandwich Terns (Sterna bengalensis) were formed.

In 2003 (see recent reports section) three adult Lesser Crested Terns were reported in Ebre delta since early may (see a photo here). Of those, one formed a pure pair and another a hybrid pair with Sandwich Tern. 

The pure pair was seen with one chick all July long (David Bigas) when two photos, one of an adult and another of an adult plus one chick from the pure pair were taken on 12.7 (David Bigas). The other hybrid pair S.bengalensis x S.sandicensis produced a chick seen on 29.6 to 1.7 and finally ringed on 2.8, also featured below (David Bigas, Francesc Vidal, Julia Piccardo et al)

Due to the interest of this documentation we reproduce below these photos thanks to David Bigas.

Photographs

All photos by © David Bigas photographed using digital camera Nikon through telescope.

Lesser Crested Terns (Sterna bengalensis) chick (left) and adult (right). PN Delta de l'Ebre, Tarragona, 12 july 2003 (Photos © David Bigas) 
Charranes bengaleses (Sterna bengalensis) pollo (izquierda) y adulto (derecha). PN Delta de l'Ebre, Tarragona, 12 julio 2003 (Fotos © David Bigas) . 
Xatracs bengalis (Sterna bengalensis) poll (esquerra) i adult (dreta). PN Delta de l'Ebre, Tarragona, 12 juliol 2003 (Fotos © David Bigas) 

Lesser Crested Tern (Sterna bengalensis), adult. PN Delta de l'Ebre, Tarragona, 12 july 2003 (Photo © David Bigas) 
Charrán bengalés (Sterna bengalensis), adulto. PN Delta de l'Ebre, Tarragona, 12 julio 2003 (Foto © David Bigas) . 
Xatrac bengalí (Sterna bengalensis), adult . PN Delta de l'Ebre, Tarragona, 12 juliol 2003 (Foto © David Bigas) 

Confirmed Lesser Crested x Sandwich Tern (Sterna bengalensis x sandvicensis) hybrid chick . PN Delta de l'Ebre, Tarragona, 2 july 2003 (Photo © David Bigas) 
Pollo híbrido confirmado de Charrán bengalés y patinegro (Sterna bengalensisx sandvicensis) . PN Delta de l'Ebre, Tarragona, 2 julio 2003 (Foto © David Bigas) . 
Poll híbrid confirmat de Xatrac bengalí i becllarg (Sterna bengalensis x sandvicensis) . PN Delta de l'Ebre, Tarragona, 2 juliol 2003 (Foto © David Bigas) 



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Breeding orange-billed terns in Catalonia, July 2003. 

Summary:
Introduction
Photographs
Acknowledgements




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