Two papers about effects of the wind and the large water surface on Short-toed Eagle migration have been prepared by Spanish and Italian researchers and released this year:
• Javier VIDAL-MATEO, Ugo MELLONE, Pascual LÓPEZ-LÓPEZ, Javier DE LA PUENTE, Clara GARCÍA-RIPOLLÉS, Ana BERMEJO, Vicente URIOS, 2016 – Wind effects on the migration routes of trans-Saharan soaring raptors: geographical, seasonal, and interspecific variation // Current Zoology, 62: pp. 89-97. – 
(En). This thorough article can be found on the University of Valencia website.
• Nicolantonio AGOSTINI, Marco GUSTIN & Michele PANUCCIO, 2016 – Short-toed snake eagles Circaetus gallicus (Gmelin, 1788) (Aves: Accipitridae) approaching a water barrier show reverse direction of migration // Italian Journal of Zoology, DOI: 10.1080 / 11250003.2016. 1240833. – (En) /map/. The paper is available on a website of Mediterranean Raptor Migration Network.