Environmental Instability as a Motor for Dispersal: A Case Study from a Growing Population of Glossy Ibis
Doñana-marked individuals resighted elsewhere for each year throughout the study period (from October to January, records from other months are not shown). Glossy ibises were seen in an increasing number of locations in parallel to the increase in the breeding population in Doñana. A sharp spreading of the population across Europe and northern Africa occurred during the 2005 drought. An observation from Barbados in September 2010 is not shown.