This is short, but fresh news from GREFA. Old pair of Short-toed Eagles continues to breed in captivity this year in the GREFA Wild Fauna Recovery Centre. They do it regularly during several years, but there is no much information available about each breeding attempt yet.
This is one more article from the Ardeola website:
• IRIBARRER, J.J. and RODRÍGUEZ-ARBELOA, A.., 1973 – Observaciones en un nido del Águila Culebrera (Circaetus gallicus), Navarra 1972 [Observations on a nest of Short-toed Eagle, Navarra 1972] // Ardeola 19(1), 101-106. – 
(Es) /map/.
The text was published in 1973 including some black-and-white images. The placed PDF file is not of the best quality, but it’s fairly readable.
This is the third time we bring to your attention GREFA and their successes in breeding and following release of Short-toed Eagles.
The second thing is an appearance of the Observado.org website as a global version of Waarneming.nl we told about before. Please take a look at the ‘About this species’ right column menu there.
We would like to point your attention to some news (Es) of GREFA concerning the breeding of Short-toed Eagles in captivity during the season 2007. You can use the search form to find all materials on the species on this site. Such as Nacimiento de un Águila Culebrera en GREFA or Cría de Cernícalo primilla 2007 including before-mentioned.
The next subject of the post is a link to one more short video of Short-toed Eagle eating a snake. The source is the Videoscoping section of the Stage6 website.
There are two short notes describing cases of Short-toed Eagles’ successful breeding in captivity in 2006 year on two different sites:
• Reintroducida un Aguila culebrera nacida en cautividad – Enviado por: GREFA el Sabado, 15 de Julio de 2006 – 02:43 CET (Es).
• Un circaète Jean-Le-Blanc nait en captivité – Agence France-Presse; Lourdes, France, Le jeudi 15 juin 2006 (Fr).
Here you can acquaint yourself with the work on the wintering of Short-toed Eagle and Booted Eagle in Spain:
• José Enrique Martínes y José Antonio Sánchez-Zapata, 1999 – Invernada de Aguililla Calzada (Hieraaetus pennatus) y Culebrera Europea (Circaetus gallicus) en España [Wintering of Booted Eagles and Short-toed Eagles in Spain] // Ardeola 46 (1): 93-96 – (Es) (source – Ardeola website).
…and with the abstract of an article about Greek Short-toed Eagles:
• D.E. Bakaloudis, C.G. Vlachos, G.J. Holloway, 1998 – Habitat Use by Short-Toed Eagles Circaetus gallicus and Their Reptilian Prey During the Breeding Season in Dadia Forest (North-Eastern Greece) // Journal of Applied Ecology, Vol. 35, No. 6: 821-828 (En) /map/ (source – the JSTOR database).
This is just selection of links on miscellaneous texts and abstracts of articles about Short-toed Eagles. So…
Some abstracts can be found on the NCBI website with PubMed database:
• Sacchi P, Soglia D, Maione S, Meneguz G, Campora M, Rasero R, 2004 – A non-invasive test for sex identification in short-toed Eagle (Circaetus gallicus) // Mol Cell Probes, Jun 18 (3): 193-6. (En).
• Martin GR, Katzir G, 1999 – Visual fields in Short-toed Eagles, Circaetus gallicus (Accipitridae), and the function of binocularity in birds // Brain Behav Evol, 53 (2): 55-66. (En).
The encyclopedic compilation of information (Es) among other things has extensive ornithological bibliography concerning researching of Short-toed Eagle. The source is a site of the Enciclopedia Virtual de los Vertebrados Españoles.