Two more articles on migration of Short-toed Eagles came out this year:
• Mellone U., Klaassen R.H.G., García-Ripollés C., Limiñana R., López-López P., Pavón D., Strandberg R., Urios V., Vardakis M., Alerstam T., 2012 – Interspecific comparison of the performance of soaring migrants in relation to morphology, meteorological conditions and migration strategies // PLoS ONE 7(7): e39833. doi:10.1371 / journal.pone.0039833 – 
(En).
• Frédéric Jiguet, Damien Chevallier, François Baillon, Julien Ventroux & Pascal Cavallin, 2012 – Sub-Saharan staging areas of a first-summer Short-toed Snake Eagle Circaetus gallicus // Bird Study, 59(1): 102-104. (En).
The first one is based on comparative data concerning Osprey, Marsh Harrier, Egyptian Vulture and Short-toed Eagle.