caa a22 4500 388051833 CHVBK 20180307125055.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0959270900001921 doi S0959270900001921 pii (NATIONALLICENCE)cambridge-10.1017/S0959270900001921 Status and trends of the Common Crane Grus grus on the western route [Elektronische Daten] The evolution of 40 wintering areas of Grus grus in the south-west of the Iberian Peninsula has been studied, including the traditional wintering places of this species on its western route. Eight of these areas harboured 50% of the whole population using this route, and none of the 40 areas showed a decline in the number of birds during the study period. At present the number of cranes in each area is much greater than in the 1979-1980 winter. No geographical trends have been observed regarding the magnitude of the increase, which is closely related to that observed for the whole Spanish and Palearctic populations. Despite the emergence of some new wintering areas, the magnitude of the increase is greater in more southerly parts of the range. This may be a consequence of greater diversity and availability of food in these latitudes. The influence of enhanced international protection and agricultural food sources on the appearance of new wintering areas is discussed. Copyright © Birdlife International 1998 Sánchez Guzmán J. M. Grupo de Investigación en Conservación, Área de Biología Animal, Universidad de Extremadura, 06071 Badajoz, España. Avilés J. M. Grupo de Investigación en Conservación, Área de Biología Animal, Universidad de Extremadura, 06071 Badajoz, España. Medina F. J. Grupo de Investigación en Conservación, Área de Biología Animal, Universidad de Extremadura, 06071 Badajoz, España. Sánchez A. Dirección General de Medio Ambiente, Junta de Extremadura, Mérida. Bird Conservation International Cambridge University Press 8/3(1998-09), 269-279 0959-2709 8:3<269 1998 8 BCI https://doi.org/10.1017/S0959270900001921 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0959270900001921 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sánchez Guzmán J. M. Grupo de Investigación en Conservación, Área de Biología Animal, Universidad de Extremadura, 06071 Badajoz, España NATIONALLICENCE 700 1- Avilés J. M. Grupo de Investigación en Conservación, Área de Biología Animal, Universidad de Extremadura, 06071 Badajoz, España NATIONALLICENCE 700 1- Medina F. J. Grupo de Investigación en Conservación, Área de Biología Animal, Universidad de Extremadura, 06071 Badajoz, España NATIONALLICENCE 700 1- Sánchez A. Dirección General de Medio Ambiente, Junta de Extremadura, Mérida NATIONALLICENCE 773 0- Bird Conservation International Cambridge University Press 8/3(1998-09), 269-279 0959-2709 8:3<269 1998 8 BCI CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge