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Wolfgang Fiedler

Wolfgang Fiedler
Max Planck Institute of Animal Behavior · Migration

PhD

About

155
Publications
82,271
Reads
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4,903
Citations
Introduction
Wolfgang Fiedler currently works at the Department of Migration at Max Planck Institute of Animal Behavior. Wolfgang does research on phenology and consequences of animal migration and is head of the Centre for Animal Marking for Southern Germany
Additional affiliations
January 1998 - December 2013
Max-Planck-Institut für Ornithologie, Teilinstitut Radolfzell
Education
February 1994 - December 1997
Max Planck Institute for Behavioural Physiology
Field of study
  • Ornithology
October 1986 - December 1993
University of Tuebingen
Field of study
  • Biology (Zoophysiology, Botany, Psychology, Geology)

Publications

Publications (155)
Article
Full-text available
Migration patterns in birds vary in space and time. Spatial patterns include chain, leapfrog and telescopic migration. Temporal patterns such as migration duration, number, and duration of stopovers may vary according to breeding latitude, sex, and season. This study aimed to verify these patterns in a long‐distance migrant, the Eurasian curlew Num...
Article
Full-text available
Wind turbines and power lines can cause bird mortality due to collision or electrocution. The biodiversity impacts of energy infrastructure (EI) can be minimised through effective landscape-scale planning and mitigation. The identification of high-vulnerability areas is urgently needed to assess potential cumulative impacts of EI while supporting t...
Article
Full-text available
Space-based tracking technology using low-cost miniature tags is now delivering data on fine-scale animal movement at near-global scale. Linked with remotely sensed environmental data, this offers a biological lens on habitat integrity and connectivity for conservation and human health; a global network of animal sentinels of environmental change.
Article
Quantifying movement and demographic events of free‐ranging animals is fundamental to studying their ecology, evolution and conservation. Technological advances have led to an explosion in sensor‐based methods for remotely observing these phenomena. This transition to big data creates new challenges for data management, analysis and collaboration....
Preprint
Full-text available
Dispersal is a key life-history trait for most species and essential to ensure connectivity and gene flow between populations and facilitate population viability in variable environments. Despite the increasing importance of range shifts due to global change, dispersal has proved difficult to quantify, limiting empirical understanding of this pheno...
Article
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Animals continuously interact with their environment through behavioral decisions, rendering the appropriate choice of movement speed and directionality an important phenotypic trait. Anthropogenic activities may alter animal behavior, including movement. A detailed understanding of movement decisions is therefore of great relevance for science and...
Article
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Finding food is perhaps the most important task for all animals. Birds often show up unexpectedly at novel food sources such as freshly tilled fields or mown meadows. Here we test whether wild European white storks primarily use visual, social, auditory or olfactory information to find freshly cut farm pastures where insects and rodents abound. Aer...
Article
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Monitoring and early detection of emerging infectious diseases in wild animals is of crucial global importance, yet reliable ways to measure immune status and responses are lacking for animals in the wild. Here we assess the usefulness of bio-loggers for detecting disease outbreaks in free-living birds and confirm detailed responses using leukocyte...
Chapter
Full-text available
Das Kapitel behandelt das Vorkommen des Schreiadlers im Bundesland´Baden-Württemberg (Bundesrepublik Deutschland).
Article
Birds striking aircraft cause substantial economic loss worldwide and, more worryingly, human and wildlife fatalities. Designing effective measures to avoid fatal bird strikes requires in‐depth knowledge of the characteristics of this incident type and the flight behaviors of the bird species involved. The characteristics of bird strikes involving...
Article
Full-text available
1. Seasonal geophysical cycles strongly influence the activity of life on Earth because they affect environmental conditions like temperature, precipitation, and daylength. An increase in daylight availability during summer is especially enhanced when animals migrate along a latitudinal gradient. Yet, the question of how daylength (i.e. daylight av...
Article
Full-text available
Background The use of tracking technologies is key for the study of animal movement and pivotal to ecological and conservation research. However, the potential effects of devices attached to animals are sometimes neglected. The impact of tagging not only rises welfare concerns, but can also bias the data collected, causing misinterpretation of the...
Preprint
Full-text available
Impacts of wind turbines including the barrier effect can be site specific and may not occur at each site . Therefore, turbine layout and facility location should be evaluated on a site-specific basis by an experienced wildlife biologist in conjunction with available information regarding local and migratory bird and bat species in, around or passi...
Article
Reliable estimates of nest‐switching are required to study avian mating systems and manage wild populations, yet different estimation methods have rarely been integrated or assessed. Through a literature review and case study, we reveal that three common methods for assessing nest‐switching blend different components, producing a wide range of esti...
Article
Full-text available
The recent increase in wind energy facilities (WEF) has led to concerns about their effect on wildlife. While the focus of most studies has mainly been on increased mortality of birds and bats due to collision, indirect effects, such as behavioural responses, are currently gaining attention. Indeed, effects of WEF on the behaviour of forest dwellin...
Article
Early-life conditions have critical, long-lasting effects on the fate of individuals, yet early-life activity has rarely been linked to subsequent survival of animals in the wild. Using high-resolution GPS and body-acceleration data of 93 juvenile white storks ( Ciconia ciconia ), we examined the links between behaviour during both pre-fledging and...
Chapter
Full-text available
In this chapter, it is shown that environmental changes affect all areas of a bird's life and that many indicators of this change can be found by observing birds and their ecology. There are some general trends observed that obviously apply to most bird species, although not to all, and might be partly biased to the temperate zones of the Northern...
Article
Full-text available
Soaring landbirds typically exploit atmospheric uplift as they fly overland, displaying a highly effective energy-saving locomotion. However, large water bodies lack thermal updrafts, potentially becoming ecological barriers that hamper migration. Here we assessed the effects of a sea surface on the migratory performance of GPS-tagged white storks...
Article
Full-text available
The Arctic is entering a new ecological state, with alarming consequences for humanity. Animal-borne sensors offer a window into these changes. Although substantial animal tracking data from the Arctic and subarctic exist, most are difficult to discover and access. Here, we present the new Arctic Animal Movement Archive (AAMA), a growing collection...
Article
Full-text available
The Arctic is entering a new ecological state, with alarming consequences for humanity. Animal-borne sensors offer a window into these changes. Although substantial animal tracking data from the Arctic and subarctic exist, most are difficult to discover and access. Here, we present the new Arctic Animal Movement Archive (AAMA), a growing collection...
Article
Timing of activity can reveal an organism's efforts to optimize foraging either by minimizing energy loss through passive movement or by maximizing energetic gain through foraging. Here, we assess whether signals of either of these strategies are detectable in the timing of activity of daily, local movements by birds. We compare the similarities of...
Article
Timing of activity can reveal an organism's efforts to optimize foraging either by minimizing energy loss through passive movement or by maximizing energetic gain through foraging. Here, we assess whether signals of either of these strategies are detectable in the timing of activity of daily, local movements by birds. We compare the similarities of...
Article
Full-text available
Seasonal animal migration is a widespread phenomenon. At the species level, it has been shown that many migratory animal species track similar climatic conditions throughout the year. However, it remains unclear whether such a niche tracking pattern is a direct consequence of individual behaviour or emerges at the population or species level throug...
Preprint
Full-text available
Background The use of tracking technologies is key for the study of animal movement and pivotal to ecological and conservation research. However, the potential effects of devices attached to animals are sometimes neglected. The impact of tagging not only rises welfare concerns, but can also bias the data collected, causing misinterpretation of the...
Article
Full-text available
Studying the causes and consequences of route selection in animal migration is important for understanding the evolution of migratory systems and how they may be affected by environmental factors at various spatial and temporal scales. One key decision during migration is whether to cross “high transport cost” areas, or to circumvent them. Soaring...
Article
Full-text available
Many juvenile birds turn into long-distance migrants within weeks of fledging. This transition involves upheavals in their energy management as major changes in growth and activity occur. Understanding such ontogenetic transitions in energy allocation has been difficult because collecting continuous data on energy costs in wild developing birds was...
Preprint
Full-text available
Studying the causes and consequences of route selection in animal migration is important for understanding the evolution of migratory systems and how they may be affected by environmental factors at various spatial and temporal scales. One key decision during migration is whether to cross “high transport cost” areas, or to circumvent them. Soaring...
Article
Full-text available
Human‐induced changes in the climate and environment that occur at an unprecedented speed are challenging the existence of migratory species. Faced with these new challenges, species with diverse and flexible migratory behaviors may suffer less from population decline, as they may be better at responding to these changes by altering their migratory...
Article
Full-text available
Understanding the movement of animals is important for a wide range of scientific interests including migration, disease spread, collective movement behaviour and analysing motion in relation to dynamic changes of the environment such as wind and thermal lifts. Particularly, the three-dimensional (3D) spatial-temporal nature of bird movement data,...
Article
Full-text available
Long-distance seed dispersal is an important ecosystem service provided by migratory animals. Plants inhabiting discrete habitats, like lakes and wetlands, experience dispersal limitation, and rely heavily on zoochory for their spatial population dynamics. Granivorous waterbirds may disperse viable seeds of wetland plants over long distances during...
Article
Outreach and citizen science are important aspects in research and development. For example, the collection of bird-related data is driven forward by non-professional ornithologists as well as by researchers. At the exhibition “From Lake Constance to Africa, a long distance travel with ICARUS” which took place during the summer 2018 at the island...
Article
Full-text available
Aim Animal movement is an important determinant of individual survival, population dynamics and ecosystem structure and function. Nonetheless, it is still unclear how local movements are related to resource availability and the spatial arrangement of resources. Using resident bird species and migratory bird species outside the migratory period, we...
Article
1.Early arrival at breeding grounds is of prime importance for migrating birds as it is known to enhance breeding success. Adults, males and higher quality individuals typically arrive earlier, and across years, early arrival has been linked to warmer spring temperatures. However, the mechanisms and potential costs of early arrival are not well und...
Article
Full-text available
Soaring migrant birds exploit columns of rising air (thermals) to cover large distances with minimal energy. Using social information while locating thermals may benefit such birds, but examining collective movements in wild migrants has been a major challenge for researchers. We investigated the group movements of a flock of 27 naturally migrating...
Article
Exploring how flocks of soaring migrants manage to achieve and maintain coordination while exploiting thermal updrafts is important for understanding how collective movements can enhance the sensing of the surrounding environment. Here we examined the structural organization of a group of circling white storks ( Ciconia ciconia ) throughout their m...
Conference Paper
Full-text available
Considerate rise of knowledge of bats distribution and their important habitats has been made in the past decade in Montenegro, Albania and Macedonia, therefore bat fauna of Kosovo is now the least known in the region. Last overview (Paunović 2016) has listed only 14 bat species on 10 sites, based on observations preceding 1996. During the last two...
Conference Paper
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In 2016 - 2017 for the first time in Kosovo a pilot project for White Stork GPS tracking was started. In 2016 we equipped three white storks (Ciconia ciconia) nestlings and in 2017 two of them with GPS loggers including accelerometers. We used this method to study the migratory orientation of juvenile white storks from the population in Kosovo duri...
Article
Full-text available
Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint wer...
Article
Full-text available
The Blackcap Sylvia atricapilla is a model species for the evolution of bird migration in a time of global change. However, many assumptions about putative changes to their migratory paths have not been verified because, until recently, it has not been possible to track individual small passerines throughout the entire migration cycle. With the rec...
Article
Full-text available
Bio-logging, the on-animal deployment of miniaturised electronic data recorders, allows for the study of location, body position, and physiology of individuals throughout their ontogeny. For terrestrial animals, 1 Hz GPS-position, 3D-body acceleration, and ambient temperature provide standard data to link to the physiology of life histories. Enviro...
Article
Full-text available
Increased human-induced environmental changes and global warming alter bird migration timing and routes. Recently, many Holarctic species, including white storks, Ciconia ciconia, were reported to overwinter at higher latitudes, closer to breeding grounds. We aimed to understand the causes and implications of this phenomenon by examining bird survi...
Article
Zusammenfassung de Über Land segelnde Großvögel sind auf einen möglichst kostengünstigen Streckenflug angewiesen. Der bis über 8000 km lange Zug osteuropäischer Weißstörche in südafrikanische Wintergebiete oder die riesige Flächen abdeckenden Nahrungssuchflüge von Geiern sind nur dank optimierter Segelflugeigenschaften der Vögel physiologisch zu be...
Chapter
Full-text available
In this chapter, it is shown that environmental changes affect all areas of a bird’s life and that many indicators of this change can be found by observing birds and their ecology. There are some general trends observed that obviously apply to most bird species, although not to all, and might be partly biased to the temperate zones of the northern...
Article
Full-text available
The flight performance of birds is strongly affected by the dynamic state of the atmosphere at the birds' locations. Studies of flight and its impact on the movement ecology of birds must consider the wind to help us understand aerodynamics and bird flight strategies. Here, we introduce a systematic approach to evaluate wind speed and direction fro...
Article
Full-text available
Climate change probably has severe impacts on animal populations, but demonstrating a causal link can be difficult because of potential influences by additional factors. Assessing global impacts of climate change effects may also be hampered by narrow taxonomic and geographical research foci. We review studies on the effects of climate change on po...
Data
Full-text available
Table S1. Search strings used to find literature for our meta-analysis. Table S2. Variables extracted for meta-analysis Table S3. Citation list of the literature reviewed in our study Table S4. List of species investigated by our reviewed studies, including 196 amphibian and 118 reptilian species, including unidentified species (sp.). Table S5. Com...
Article
Full-text available
Although many birds are socially monogamous, most (>75%) studied species are not strictly genetically monogamous, especially under high breeding density. We used molecular tools to reevaluate the reproductive strategy of the socially monogamous white stork (Ciconia ciconia) and examined local density effects. DNA samples of nestlings (Germany, Spai...
Article
Recoveries of marked animals hold long-term, large-scale information on survival and causes of mortality, but are prone to bias towards dead recoveries and casualties in the range of presence of potential finders. Thus, accounting for circumstance-related recovery probabilities is crucial in statistical approaches. For the little owl, a species of...
Article
Full-text available
The European Union for Bird Ringing (EURING) coordinates bird ringing at a continental scale and operates the EURING Data Bank (EDB) to facilitate large-scale analyses of movements and demography. The EDB contains over 10 million individual encounter records which are summarised on a publicly available website, the EDB index. EURING welcomes applic...
Article
Full-text available
The solar day–night rhythm imposes a strict diel activity pattern on many organisms. Among birds, most species are generally either active during the day and rest during the night, or vice versa. However, many waterbird species can be active during both daylight and darkness. Hence, these species are much less limited by an external clock to alloca...
Article
Full-text available
Since the mid 1990s the three German Vogelwarten operate a Constant Effort Ringing Scheme ("Integriertes Monitoring von Singvogel populationen; IMS") aiming to obtain besides population indices productivity indices and estimates of survival rates. From 1998 until 2013 74 sites were operated. The sites aren't distributed uniformely across Germany, c...
Article
Full-text available
1.Migration conveys an immense challenge especially for juvenile birds coping with enduring and risky journeys shortly after fledging. Accordingly, juveniles exhibit considerably lower survival rates compared to adults, particularly during migration. Also, juvenile white storks (Ciconia ciconia), which are known to rely on adults during their first...
Article
Full-text available
Mittels des lasergestützten Zielverfolgungssystems VECTOR IV wurden zahlreiche Flugbahnvermessungen von im freien Flug gleitenden Störchen durchgeführt. Aus den Messdaten konnten die Gleitbahnen rekonstruiert sowie die arteigenen Flug- und Sinkgeschwindigkeiten berechnet werden. Darüber hinaus wurden zahlreiche morphometrische Untersuchungen, wie B...
Article
Full-text available
The last decade has seen a surge in research on avian influenza A viruses (IAVs), in part fuelled by the emergence, spread and potential zoonotic importance of highly pathogenic virus subtypes. The mallard (Anas platyrhynchos) is the most numerous and widespread dabbling duck in the world, and one of the most important natural hosts for studying IA...
Article
1.Many partially migratory species show phenotypically divergent populations in terms of migratory behaviour, with climate hypothesized to be a major driver of such variability through its differential effects on sedentary and migratory individuals. 2.Based on long-term (1947-2011) bird ringing data, we analysed phenotypic differentiation of migrat...
Article
Full-text available
Annual migratory movements can range from a few tens to thousands of kilometers, creating unique energetic requirements for each specific species and journey. Even within the same species, migration costs can vary largely because of flexible, opportunistic life history strategies. We uncover the large extent of variation in the lifetime migratory d...
Article
Full-text available
Free-flight paths of White Storks (Ciconia ciconia L. 1758) were tracked using a modified laser rangefinder system (Vector IV) based on a 1550-nm diode laser. Field measurements were taken of two flocks comprising approximately 100 adult storks in all. Tracking data allowed mathematical reconstruction of their spatial trajectories using a ground-mo...
Article
Full-text available
Long-distance migration is a rare phenomenon in European bats. Genetic analyses and banding studies show that females can cover distances of up to 1,600 km, whereas males are sedentary or migrate only short distances. The onset of this sex-biased migration is supposed to occur shortly after rousing from hibernation and when the females are already...