2018
DOI: 10.4314/vulnew.v73i1.1
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Maximum number of Griffon Vultures ever recorded on active migration in a single day at the Strait of Gibraltar

Abstract: The Strait of Gibraltar is the most important bottleneck for Griffon Vulture (Gyps fulvus) migration in the Palaeartic but its monitoring has been irregular during the last four decades. The breeding population in Spain and the number of vultures recorded migrating across the Strait have both increased, as has the knowledge about their migratory routes, favourable migratory weather conditions and this species' overall phenology. Despite this, the Griffon

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“…The first result, showing a higher proportion of immature birds in summer was expected. It is known that immature Griffon Vultures perform short migrations and nomadic displacements mainly during winter (Bernis 1983, Griesinger 1998, Ramírez 2018. More interesting was that, in the years of the Tolerance legislation scenario (from 2014 onwards), with more available food, the proportion of immature vultures decreased at random carcasses and, to a lesser extent in predictable feeding sites.…”
Section: Discussionmentioning
confidence: 95%
“…The first result, showing a higher proportion of immature birds in summer was expected. It is known that immature Griffon Vultures perform short migrations and nomadic displacements mainly during winter (Bernis 1983, Griesinger 1998, Ramírez 2018. More interesting was that, in the years of the Tolerance legislation scenario (from 2014 onwards), with more available food, the proportion of immature vultures decreased at random carcasses and, to a lesser extent in predictable feeding sites.…”
Section: Discussionmentioning
confidence: 95%