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Survival and dispersal of the Cyprus Wheatear Oenanthe cypriaca, an endemic migrant

Research output: Contribution to journalArticle


Many populations of European migrant bird species are declining and this may be driven by survival rates but there are few studies that can estimate true survival rates. Cyprus Wheatears Oenanthe cypriaca are an endemic migrant that winter in East Africa: populations are probably not declining but are annually variable. We measured their apparent survival by recording territory occupation and reoccupation in a colour-ringed population of 45 - 69 pairs over a 4 year period (2010-2013) from April – August, to determine how it varied with sex, age and year. We then estimated true survival by correcting apparent survival for dispersal by recording territory shifts and how this also varied by sex, age and year. Apparent annual survival rate varied significantly by sex, age and year (males 2011,2012, 2013 : 0.70, 0.50, 0.62; females: 0.56, 0.34, 0.47; chicks: 0.35, 0.19, 0.28) but was not affected by the productivity of territory. An average of 1.1% of males and 8.2% of females were lost during breeding, where 5/7 lost females were found depredated during incubation. Adults did not usually change territories between years (87% resident and 99% moved less than 4 territories between years) regardless of sex, productivity or year; chicks, independent of their sex, moved on average three territories away from their natal territory. After correcting apparent survival for the probability of dispersal, males had the highest true minimum annual survival compared to females which were very similar to chicks (males 2011, 2012, 2013: 0.77, 0.50, 0.65; females: 0.65, 0.35, 0.50; chicks: 0.64, 0.34, 0.49). The results indicate a very high survival rate for a small passerine migrant, although they are probably sufficiently annually variable to profoundly affect annual population dynamics. If females have lower survival, sex ratio at birth may be female biased to compensate; alternatively females may have longer range dispersal than we could measure, particularly if they respond to their mates not returning by moving territories, leading to an underestimate of their true survival. High survival may be due to the rarity of sparrowhawks on Cyprus and the wheatears relatively short distance migration.



Original languageEnglish
Pages (from-to)707-719
Number of pages13
JournalJournal of Ornithology
Issue number3
Early online date4 Feb 2016
Publication statusPublished - Jul 2016

    Research areas

  • Palearctic migrants, Site fidelity, Oeananthe cypriaca, Migration, Mortality

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