6/13/2023 0 Comments Red kite food![]() ![]() Specifically, a focus is set on sibling rivalry and stress physiology at the developmental stage and their link to social behaviour and movement patterns during the post-fledging and adult phases.ĭrivers and consequences of partial migration (PhD thesis Stephanie Witczak): Stephanie aims to investigate the drivers of partial migration in terms of the individual characteristics of migrants and residents, as well as local environmental conditions. Nestling stress physiology and carryover effects (PhD thesis Benedetta Catitti): Benedetta analyses the factors affecting Red Kites during development in the nest and assesses whether their effect carries-over to later life stages. ![]() Patrick also disentangled dispersal and migration movements to investigate how natal environment effects carry-over to affect prospecting movements during different dispersal phases. This crucial time in the life of a young bird marks the start of dispersal. ![]() Patrick investigated the interplay of environmental factors shaping the reproductive output of a Red Kite population and how natal conditions affect the timing of departure from the natal home range. They might even affect post-fledging behavior of juvenile Red Kites. Apart from direct anthropogenic feeding, we also examine the role of the Red Kite in the Swiss scavenger community.ĭeparture and early prospecting phase (PhD thesis Patrick Scherler): The environmental conditions at the place of birth affect survival and body condition. Private feeding of Red Kites seems a widespread phenomenonin Switzerland, and a special focus is therefore given to the role of anthropogenic food sources for Red Kite’s reproductive success and space use in summer and winter. Pietro Milanesi): In the context of several Master theses, we investigate the diet composition along the elevational gradient. Modulesĭiet composition and anthropogenic feeding (several Master theses, Postdoc Dr. Our goal is to investigate the factors that affect survival rate, reproduction, dispersal, and space use in general, to explain the population growth and distribution of the Red Kite in Switzerland and Europe. The species often attends large communal roosts. As a result, Switzerland is currently the country with the highest density of overwintering Red Kites. In addition, a new overwintering strategy has emerged while winters were traditionally spent on the Iberian Peninsula, an increasing fraction of the population nowadays overwinters in central Europe. Moreover, the upper elevational range limit keeps expanding as the species increasingly colonizes alpine valleys. Since the 1970s, the Red Kite has recolonized the northern half of the country with remarkable speed. The Red Kite is, thus, one of 50 national priority species in the Swiss species recovery program. ![]() Currently, Switzerland harbors almost 10% of the global breeding population. Fortunately, the population of this nearly endemic European raptor has increased over the last years and is now considered as Least Concern at both a global and national level. Similar negative trends were observed Europe-wide. AimsĪs a result of human persecution, the Red Kite was almost extirpated from Switzerland in the early 20 th century. One of the Swiss Ornithological Institute’s major research projects aims to find out how this charismatic species achieves this. Mechanisms of population dynamics in Red KitesĪfter facing near extinction, the Red Kite has recolonized the Swiss Central Plateau with remarkable speed, continuously expanding its upper elevational range. Conservation and enhancement of habitats.Recovery programmes for priority species.Tracking devices: miniaturized geolocatorsĪnalysis tools: Ring re-encounter analysis Surveillance of (bird) migration on Col de Bretolet Stress and disturbances - terminated projects Population dynamics - terminated projects Ecological research - terminated projects ![]()
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