Use of ring recoveries to predict habitat suitability in small passerines

  • Tellería J
  • Santos T
  • Refoyo P
 et al. 
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Aim  Abundance of small passerines may be distributed over large wintering areas according to geographical patterns that are difficult to detect. This may prevent the identification and conservation of the most suitable sectors, or the detection of local and regional features affecting the species during winter. In this paper, we explore the usefulness of ring recoveries to predict bird distribution in wintering grounds by using Maxent, one of the presence-only techniques available for modelling species distributions. We test whether suitability indices obtained in 2.5-�+�-�2.5-�km UTM squares from ring recoveries were positively correlated with the actual abundance of robins (Erithacus rubecula) and blackcaps (Sylvia atricapilla) inside the squares. Location  Spain. Methods  We used 686 and 1139 localities across the country in which blackcap and robin ring recoveries were recorded by the Spanish Office of Migratory Species to generate the suitability maps. In addition, we sampled bird abundance inside 70 control squares independent of ring recovery localities along a belt crossing mountains, highlands and lowlands of the Iberian Peninsula during January from 2006 to 2011. Results  Suitability indices predicted by Maxent were positively correlated with robin (r-�=-�0.42, n-�=-�70, P-�

Author-supplied keywords

  • Abundance patterns
  • Migratory birds
  • Modelling spatial distribution
  • Occurrence data
  • Ring recoveries

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  • José Luis Tellería

  • Tomás Santos

  • Pablo Refoyo

  • Jesús Muñoz

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