The following new paper describes the relation of Short-toed Eagle population to the availability of natural habitats which are being used by them as breeding sites in the Judea region of Israel /map/:
• Ezra Hadad, Gilad Weil and Motti Charter, 2015 – The importance of natural habitats as Short-toed Eagle (Circaetus gallicus) breeding sites // Avian Biology Research, 8 (3): pp. 160–166. – 
(En).
Thanks a lot to Dr. Motti Charter for sharing the file!
Several new works on Short-toed Eagle have been published and included in Guido Premuda‘s Bibliography (Sunbird.it) this year:
• Premuda G., 2015 – La migrazione dei rapaci sulle Alpi Apuane: campo Biancone marzo 2015 [The migration of birds of prey in the Apuan Alps /map/: March Short-toed Eagle camp 2015]. Infomigrans 34-2015. – (It).
• Premuda G. & Belosi A., 2015 – Short-toed Eagle Circaetus gallicus population increase in Italy: hypothesis of root causes // Avocetta 39: 13-17. – (En).
• Premuda G., Belosi A., Viviani F. & Franchini M., 2015 – Short-toed Eagle Circaetus gallicus population monitoring at the Apuane Alps migration watch-site (Tuscany) // Avocetta 39: 5-12. – (En).
Just some articles containing basic facts on distribution, biology and ecology of Short-toed Eagles in Poland, Ukraine and Bulgaria:
• J. Hordowski, 2015 – Gniazda i lęgi ptaków Polski [Polish birds’ nests and broods]: Gadożer Circaetus gallicus – pp. 515-522. – (Pl).
• С. Домашевський, К. Письменний, 2009 – Змієїд Circaetus gallicus // Червона книга України. Тваринний світ [Red book of Ukraine. Animals]: p. 425. – (Uk).
• B. Tonchev, T. Petrov, S. Stoychev, E. Stoynov, K. Velev, 2007 – Орел змияр Circaetus gallicus // Атлас на гнездящите птици в България [Atlas of the breeding birds in Bulgaria]: pp. 138-139. – (Bg)(En).
This time fossil remains of an ancient species of Circaetus were found in the vicinity of the Varshets town (Northwestern Bulgaria) /map/. This species had lived in SE Europe about 2.2-2.4 millions of years ago:
• Z. Boev, 2015 – An Early Pleistocene Snake Eagle, Circaetus haemusensis sp. n. (Aves, Accipitriformes) from Varshets, Northwestern Bulgaria // Acta zool. bulg., 67 (1): pp. 127-138. – (En).
The current article, like the prevous one, is represented on a website of the journal Acta zoologica bulgarica.
Many thanks to Guilad Friedemann for kind information about a new project of the KKL Fund – HD Web camera at a nest of Short-toed Eagle in Israel /map/. The online stream and a brief description of the project are available in Hebrew now, the English translation will appear soon. Besides, you can find texts about Guilad’s research in English and in Hebrew, view current data on observations of STE in the country and enjoy a video recently recorded with the installed camera; more clips are also listed on this page now. So help you Google Translate!
UPD May 1st, 2015: the Facebook community has been created for uploading and watching video clips made with the camera.
Observations of Short-toed Eagles in Northern Ukraine in 2014 which deserve to be noted:
• K. PISMENNYI, 2015 – Data on breeding of Short-toed Eagle in Northern Ukraine – , XLS file with formulas – ; Replacement of the biggest 14 flight feathers – ; Some short notes on Short-toed Eagles in Northern Ukraine in 2014 // short-toed-eagle.net (En).
The paper listed below is available on a website of Mediterranean Raptor Migration Network. To know the latest news of this non-profit community just follow the FB page of the organisation.
• Panuccio M., Lucia G., Agostini N., Ottonello D. & Bogliani G., 2014 – Motion capacity, geography and ecological features explain the present distribution of a migratory top predator // Ecological Research DOI: 10.1007/s11284-014-1226-2. – (En).