Resumen de Where do Pallas's and yellow-browed warblers (phylloscopus proregulus, ph. inornatus) go after visiting northwest Europe in autumn?. An iberian perspective
The occurrence patterns of these Siberian passerines in the western Palearctic are examined in order to test the different hypotheses regarding their causes. In particular, it is attempted to check whether the geographical distribution of records may be biased by an uneven distribution of potential observers.
