Results 11 to 20 of about 310 (151)
AerospaceBirds in airport airspaces are critical threats to aviation safety. Avian radar systems are effective for long-range bird monitoring and hazard warning, but their functionalities are confined to a short-term temporal scale.
Jia Liu, Qunyu Xu, Min Su, Weishi Chen
doaj +2 more sources
Quantitative ornithology with a commercial marine radar: standard‐target calibration, target detection and tracking, and measurement of echoes from individuals and flocks [PDF]
Methods in Ecology and Evolution, 2016 Summary Marine surveillance radars are commonly used for radar ornithology, but they are rarely calibrated. This prevents them from measuring the radar cross‐sections (RCS) of the birds under study. Furthermore, if the birds are aggregated too closely for the radar to resolve them individually, the bulk volume reflectivity cannot be translated into a
Samuel S. Urmy, Joseph D. Warren
openaire +2 more sources
Within-Night Variation in Predictor Importance Highlights Dynamic Nature of Bird Migration. [PDF]
Ecol LettBar chart summarising median percent of gain contributed by each predictor type (atmospheric, sampling and terrestrial) for each timestep after sunset for spring (left) and fall (right) bird migration seasons. Predictor types are denoted by different colours.
Jimenez MF, Khalighifar A, Horton KG.
europepmc +2 more sources
Movement Ecology, 2023 Background Millions of birds travel every year between Europe and Africa detouring ecological barriers and funnelling through migratory corridors where they face variable weather conditions.
Paolo Becciu +4 more
doaj +1 more source
Consistency of spatio‐temporal patterns of avian migration across the Swiss lowlands
Remote Sensing in Ecology and Conservation, 2020 Each year, billions of birds migrate across the continents by day and night through airspaces increasingly altered by human activity, resulting in the deaths of millions of birds every year through collisions with man‐made structures.
Philippe Tschanz +4 more
doaj +1 more source
Comparing imaging, acoustics, and radar to monitor Leach’s storm-petrel colonies [PDF]
PeerJ, 2019 Seabirds are integral components of marine ecosystems and, with many populations globally threatened, there is a critical need for effective and scalable seabird monitoring strategies.
Rachael A. Orben +10 more
doaj +2 more sources
PLoS ONE, 2021 Millions of bird observations have been entered on online portals in the past 20 years either as checklists or arbitrary individual entries. While several hundred publications have been written on a variety of topics based on bird checklists worldwide ...
Nadja Weisshaupt +3 more
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The relative importance and biological significance of non-stop and intermittent flight strategies in bird migrants crossing the Sahara [PDF]
, 2007 IX Summary The aim of this thesis was to investigate the flight and resting strategies of birds crossing the Sahara on migration. In order to overcome the severe limitations of ground observations, we chose radar to obtain continuous data of the temporal
Schmaljohann, Heiko
core +1 more source
Accuracy and Resolution Capacity of MRL-5(Is) Radar Ornithological Station and its Potential Development [PDF]
ring, 2012 Abstract Dinevich L., Leshem Y. 2012. Accuracy and resolution capacity of MRL-5(Is) radar ornithological station and its potential development. Ring 34: 3-21. The paper presents the comprehensive assessment of the resolution capacity of MRL-5(Is) radar ornithological station developed in Israel.
Leonid Dinevich, Yossi Leshem
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Beware the Boojum: Caveats and Strengths of Avian Radar
Human-Wildlife Interactions, 2017 Radar provides a useful and powerful tool to wildlife biologists and ornithologists. However, radar also has the potential for errors on a scale not previously possible.
Robert C. Beason +2 more
doaj +1 more source