• Agostini N., Mellone U., 2008 – Does migration flyway of Short-toed Eagles (Circaetus gallicus) breeding in Central Italy reflect the colonization history? // Journal of Raptor Research, 42(2): 158-159. – 
(En).
We extend our thanks to Ugo Mellone for pointing the article out. It can be found among other papers on the Publications section of his website.
You can find an article of Christos G. Vlachos on the University of New Mexico. University Libraries website. The work was dedicated to Short-toed Eagle ecology in North-Eastern Greece /map/:
• CHRISTOS G. VLACHOS and NIKOLAOS K. PAPAGEORGIOU, 1994 – Diet, breeding success, and nest-site selection of the Short-toed Eagle (Circaetus gallicus) in Northeastern Greece // Raptor Res. 28(1): 39-42. – (En).
A few articles of Prof. Viktor Belik (Rostov State Pedagogical University) on distribution, number and ecology of Short-toed Eagles in several different regions (Ru):
• Белик В.П., 1994 – Распространение, численность и экология змееяда в степном Подонье [Distribution, number and ecology of Short-toed Eagle in steppe Podonie] // Кавказ. орнитол. вестник, вып.6.- Ставрополь. – С.26-29. /map/
• Афанасьев В.Т., Белик В.П., 1998 – Змееяд в Сумском Полесье [Short-toed Eagle in Sumy Polesie] // Птицы бассейна Сев. Донца, вып.4-5: Мат-лы 4 и 5 конф. “Изучение и охрана птиц басс. Сев. Донца”. – Харьков. – С.45-46. /map/
• Белик В.П., Ветров В.В., Бабич М.В., Трофименко В.В., 1999 – Змееяд в Волгоградской области [Short-toed Eagle in Volgograd Region] // 3 конф. по хищным птицам Вост. Европы и Сев. Азии: Мат-лы конф., ч.2.- Ставрополь. – С.20-23. /map/
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The photos were taken during an expedition of Prof. Belik in summer of 2008 in Volgograd Region.
