Pre-Migratory Movements of Adult Montagu's Harriers Circus pygargus

Ardea

Ruben Limiñana¹  Pascual López-López²  Vicente Urios¹  Alvaro Soutullo¹ 

[1] 1 Estación Biológica Terra Natura (CIBIO - Fundación Terra Natura), Universidad de Alicante, Apdo. correos 99, Alicante E-03080, Spain;1 Estación Biológica Terra Natura (CIBIO - Fundación Terra Natura), Universidad de Alicante, Apdo. correos 99, Alicante E-03080, Spain2 “Cavanilles” Institute of Biodiversity and Evolutionary Biology, University of Valencia, Polígono de la Coma s/n, E-46980 Paterna, Valencia, Spain

关键词: Staging Areas;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

Pre-migratoryandmigratorymovementsofMontagu'sHarrierCircuspygargus,along-distancemigrant,arepoorlydocumentedbyringrecoveriesandobservations.Inthepresentstudy,wetagged10adultMontagu'sHarriersinNESpainwithsatellitetransmittersandtrackedtheirmovementsuntiltheirarrivalonthewinteringgrounds.Toidentifytheendofthebreedingseasonandtheonsetofthemigrationbasedonoursatellite-telemetrydatawedevelopedandappliedastatisticalapproach,definingthetimeperiodbetweenthesetwoeventsasthepre-migratorystage.Wethencomparedhabitatpreferencesduringthebreedingseasonandthepre-migratorystage.Thedurationofthepre-migratorystageaveraged42days,withharriersleavingthebreedingareasbetween4Juneand27July,andtheonsetofthemigrationtakingplacebetween25Julyand4September.Stagingareasusedduringpre-migrationwerelocatedathigheraltitudesthanthebreedinggrounds,andwerecharacterizedbythepresenceofshrublandsandcultivatedareas,mainlycereals.Montagu'sHarriers'useofthesesitesislikelytoberelatedtofoodavailability:athigheraltitudes,peakabundanceofOrthoptera,theirmainpreysource,occurslaterintheseasonthaninthelowlandbreedingarea.Pre-migratorymovementsmayalsoplayanimportantroleinthesearchforsuitablebreedingsitesforfutureuse.

【 授权许可】

Unknown