Juvenile dispersal of saker falcons in Ukraine according satellite telemetry

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Published: січ. 24, 2016
Keywords:
Saker Falcon, migration, satellite tracking, Ukraine

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M. Prommer
Bükk National Park Directorate (Hungary)
Yu. Milobog
Kryvyi Rih National University
M. Gavrilyuk
Cherkasy National Bogdan Khmelnytsky University
V. Vetrov
Ukrainian Birds of Prey Research Centre

Abstract

Saker Falcon (Falco cherrug) is a partial migrant species. The data of its migration on the territory of Ukraine have been limited so far. In 2011 in the south of Ukraine 8 juvenile Saker Falcons were fitted with satellite transmitters. For this 22g solar ARGOS/GPS PTTs-100 transmitters were used. Two males stopped sending signals within a few days after tagging. After leaving their eyries young birds left nesting territory in 30-64 days (on average - 44). Juvenile dispersal of different birds began in a period between July, 8 to August, 5 (on average – July, 23).  During the first dispersal the birds flew east and northeast from the natal eyrie. These movements were up to several hundred kilometers and lasted from 2 to 10 days, after which the birds returned to the place of temporary settlement located in the Crimea. In one case their placing coincided with the nesting territory, in the other four cases they situated in 20-290 km. In August a juvenile male roamed from the Crimea to Cyprus. Of the three birds that lived up to winter all three spent the winter at the previously selected areas not showing migratory behaviour. In June a one-year-old juvenile male headed northeast to the western Kazakhstan, about 400 km north of the Caspian Sea, and in two months returned to the Crimea. 

Article Details

Issue
Vol. 329 No. 36 (2014): Visnyk Cherkas'koho universytetu: seriya biolohichni nauky [Cherkasy University Bulletin: Biological Sciences Series]
Section
Статті

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