An Egyptian vulture in Ethiopia. [Image 4 of 6 related images. See Image 5.]
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Researchers with the University of Utah, working with the LIFE+ project, "The Return of the Neophron," caught and tagged a total of 45 Egyptian vultures from 2012 to 2016 to learn more about where they eat, breed and migrate. Results from the study will aid in future conservation efforts in countries that these birds pass through during their annual migrations.
The researchers found that the vultures migrate along the Red Sea Flyway, a large area connecting the summer and winter ranges of birds in Eastern Europe, Central Asia, the Middle East and Africa, and that their travel routes revealed migratory bird corridors and bottlenecks.
Determining where bottlenecks exists -- places where birds concentrate on migration -- helps bird conservationists know what areas to focus on, since a large percentage of a speciesí population can pass through these small areas.
"The Red Sea Flyway connects birds from Eastern Europe, Central Asia, the Middle East -- all those birds that migrate into Africa," says Evan Buechley, a postdoctoral scholar at the University of Utah and HawkWatch International. "But because of political instability in some countries and harsh desert environs throughout, itís minimally studied. Thereís not a lot of conservation happening. Itís a big research gap."
The vultures are just one of around 35 large, soaring bird species that migrate along the Red Sea Flyway. Dozens more small birds migrate here as well. Itís the second-largest migratory flyway in the world, behind only the Americas Flyway, which connects North and South America.
After identifying key bottleneck locations, the researchers checked to see how well protected the areas are; that is, within the most important bird bottlenecks, is there any federal protection from the nations in which they sit? The answer was none, although some of the Important Bird and Biodiversity Areas (IBAs) -- places recognized for their international importance for conservation -- do overlap some of these areas and future work could focus on these sites.
Recognizing the importance of such bottlenecks is vital in influencing developments that may harm birds on migration. For example, a company building a wind farm -- one of the major hazards that vultures face along their journeys -- can assess how likely it is that their turbines may affect migrating birds. Illegal shooting and poisoning is also a concern throughout their migratory ranges, Buechley says.
The research was conducted as part of the LIFE+ project, "The Return of the Neophron," which was supported in part by the National Science Foundation (grant DGE 12-56065).
Read more in the University of Utah news story Vultures reveal critical old world flyways. (Date image taken: 2015; date originally posted to NSF Multimedia Gallery: June 28, 2018)