Study area and sampling effort distribution.
2016-01-18T15:33:22Z (GMT) by
<p>A. Distribution of tree cover and political division of the study area. AL: Algeria, MO: Morocco, PO: Portugal, SP: Spain. B. Distribution of localities where the occupancy and abundance of species was sampled. C and D. Distribution of winter localities in which ringed meadow pipits and chiffchaffs were recorded.</p>