{"id":15439,"date":"2021-03-31T12:57:00","date_gmt":"2021-03-31T09:57:00","guid":{"rendered":"http:\/\/4vultures.org\/?p=15439"},"modified":"2025-05-05T15:47:03","modified_gmt":"2025-05-05T12:47:03","slug":"new-research-reveals-when-where-and-why-egyptian-vultures-are-dying","status":"publish","type":"post","link":"https:\/\/4vultures.org\/es\/blog\/new-research-reveals-when-where-and-why-egyptian-vultures-are-dying\/","title":{"rendered":"New research reveals when, where, and why Egyptian Vultures are dying"},"content":{"rendered":"
\"\"
Egyptian Vulture Released After Being Tagged with a Remote-Tracking Device in Armenia (c) Evan Buechley<\/figcaption><\/figure>\n\n\n\n

A new tracking study<\/a> covering most of the global Egyptian Vulture distribution reveals that more Egyptian Vultures are dying in eastern Europe and the Middle East while surviving better in Sub-Saharan Africa, with approximately half of the deaths being human-induced. The new research, published in the Journal of Animal Ecology<\/em> this week, was led by Evan Buechley (International Program Director for HawkWatch International<\/a>), Ron Efrat (PhD candidate at the Ben-Gurion University of the Negev, Israel<\/a>) and Steffen Oppel (Conservation Scientist at the RSPB<\/a>).<\/p>\n\n\n\n

Methods<\/strong><\/p>\n\n\n\n

The study involved compiling and analyzing tracking data from 220 Egyptian Vultures fitted with transmitters since the early 2000s to study their movements and eventual fates, with the study area covering approximately 70% of the species global distribution, from Portugal in the West to Iran in the East, and from Russia in the north to Kenya in the south.<\/p>\n\n\n\n

The fates of the birds were determined through a combination of direct observations (such as when a dead bird could be recovered and cause of death identified) and by assessing patterns in the tracking data (for example, if data transmission stopped over water it was assumed the bird probably drowned). The analysis also accounted for when the fate of the bird could not be determined definitively, perhaps due to transmitter failure or other cause.<\/p>\n\n\n\n

The analysis also compared the survival rates of the vultures when they were migrating compared to when they were stationary, as well as among breeding populations and when the birds were in their breeding or non-breeding ranges. Age-related differences in survival were also tested for. <\/p>\n\n\n\n

Results<\/strong><\/p>\n\n\n\n