Mérida - Roman bridge over Guadiana riverBirdwatching Guide to Extremadura - John Muddeman Paperback (Jan 2000) Arlequin Publications ISBN: 1900159317

Dónde ver aves en España. Los 100 mejores lugares - (Where to see birds in Spain - the 100 best places) José Antonio Montero with collaboration of SEO/BirdLife (2005) Lynx Edicions ISBN: 84-87334-14-8

Where to Watch Birds in Southern and Western Spain: Andalucia, Extremadura and Gibraltar - Ernest Garcia & Andrew Paterson Helm 3rd Revised edition edition (25 Mar 2008) ISBN: 0713638591

Birding Extremadura – Azure Wings in the dogs bowl - Malcolm Rymer DVD £19 90mins http://www.wildlifevideos.net

Study of Cranes by the Swedish naturalist Göran Lundin. "Cranes-where, when and why?" Svärd & Söner, Falköping. Available in English from a German language Crane website - search on Google

Extremadura - Dirk Hilbers. Crossbill Guides; 2nd Revised edition edition (1 July 2011) ISBN-13: 978-9050113816