| Titre : | Unusual clockwise loop migration lengthens travel distances and increases potential risks for a central Asian, long distance, trans-equatorial migrant, the Red-footed Falcon Falco vespertinus (2016) |
| Auteurs : | Todd E. Katzner, Auteur ; Evgeny A. Bragin, Auteur ; Alexander E. Bragin, Auteur ; Michael McGrady, Auteur ; Tricia A. Miller, Auteur ; Keith L. Bildstein, Auteur |
| Type de document : | Article |
| Dans : | Bird Study (63(3) juillet 2, 2016) |
| Article en page(s) : | 406-412 |
| Résumé : | Capsule: Red-footed Falcons Falco vespertinus migrating from northern Kazakhstan proceed west before heading south to Africa; their northbound travel follows a different route with passage close to shooting hotspots in the Mediterranean.Aim: To use tracking and ringing data to document for the first time the migration of globally threatened Red-footed Falcons from northern Kazakhstan.Methods: Light-level geolocators were deployed on breeding adults in Kazakhstan and recovered one year later. Ringing and observational data from more than 100 years of Russian-language and other literature were summarized and mapped alongside the geolocator data.Results: Geolocator, ringing and observational data together demonstrate that Red-footed Falcons from northern Kazakhstan have a clockwise loop migration that begins with a long and unusual westward trek around eastern Europe’s large inland seas before continuing to extreme southern Africa. Return migration is farther west and requires crossing two major migratory barriers: the Sahara and the Mediterranean.Conclusion: The loop migration we describe requires an extensive longitudinal movement, exposes central Asian Red-footed Falcons to multiple desert, mountain and marine crossings, and, at outbound and return Mediterranean bottlenecks, crosses sites where raptor shooting is common. |
| En ligne : | http://www.tandfonline.com/doi/full/10.1080/00063657.2016.1214107 |



