ABSTRACT. We describe a new collaborative network, the Motus Wildlife Tracking System (Motus; https://motus.org), which is an international network of researchers using coordinated automated radio-telemetry arrays to study movements of small flying organisms including birds, bats, and insects, at local, regional, and hemispheric scales. Radio-telemetry has been a cornerstone of tracking studies for over 50 years, and because of current limitations of geographic positioning systems (GPS) and satellite transmitters, has remained the primary means to track movements of small animals with high temporal and spatial precision. Automated receivers, along with recent miniaturization and digital coding of tags, have further improved the utility of radio-telemetry by allowing many individuals to be tracked continuously and simultaneously across broad landscapes. Motus is novel among automated arrays in that collaborators employ a single radio frequency across receiving stations over a broad geographic scale, allowing individuals to be detected at sites maintained by others. Motus also coordinates, disseminates, and archives detections and associated metadata in a central repository. Combined with the ability to track many individuals simultaneously, Motus has expanded the scope and spatial scale of research questions that can be addressed using radio-telemetry from local to regional and even hemispheric scales. Since its inception in 2012, more than 9000 individuals of over 87 species of birds, bats, and insects have been tracked, resulting in more than 250 million detections. This rich and comprehensive dataset includes detections of individuals during all phases of the annual cycle (breeding, migration, and nonbreeding), and at a variety of spatial scales, resulting in novel insights into the movement behavior of small flying animals. The value of the Motus network will grow as spatial coverage of stations and number of partners and collaborators increases. With continued expansion and support, Motus can provide a framework for global collaboration, and a coordinated approach to solving some of the most complex problems in movement biology and ecology.Le Système de suivi de la faune Motus : un réseau de recherche collaboratif visant à mieux comprendre le déplacement des animaux RÉSUMÉ. Le Système de suivi de la faune Motus (Motus; https://motus.org), un nouveau réseau collaboratif de chercheurs internationaux, repose sur un ensemble coordonné de stations automatisées de radiotélémétrie pour étudier le déplacement de petits organismes volant, comme les oiseaux, les chauves-souris et les insectes, aux échelles locales et régionales, et à celle de l'hémisphère. Pierre angulaire pour les études de suivi depuis plus de 50 ans, la radiotélémétrie est encore le principal moyen de suivre le déplacement de petits animaux avec une grande précision temporelle et spatiale, en raison des limites que présentent les émetteurs basés sur le système de positionnement géographique (GPS) ou satellite. Des stations réceptrices automatisées,...
Recent population trends of Ontario's forest birds were assessed by integrating results across 8 bird surveys to provide an estimate of trend status for all of Ontario, and for 2 forested regions of Ontario separately. Surveys with mid-and longterm trends were relied on most extensively in this assessment. Comparison of the first and second Breeding Bird Atlases was especially important for estimating trends in northern forests, but overall reliability of status assessments in the north was considered poor due to limited coverage and significant potential for bias. Trends of most forest birds were stable or positive at the Ontario-wide scale, with trends at least as positive as forest birds elsewhere in North America, and showing more positive trends overall than birds of agricultural landscapes. Nevertheless, individual species trends ranged from large declines to large increases, and several forest birds have been added to Species at Risk lists largely because of population declines. There were few differences in trend status among forest birds grouped by habitat association or migratory guild, although all 5 aerial insectivore species have declined. Better monitoring coverage of the boreal will be needed if improved reliability of trends is desired in the near future.Key words: Ontario, forest birds, boreal forest, population trend, bird surveys, monitoring reliability RÉSUMÉLes fluctuations récentes des populations d' oiseaux forestiers de l'Ontario ont été évaluées au moyen de l'intégration des résultats de 8 relevés d' oiseaux pour produire un estimé de la tendance actuelle pour tout l'Ontario ainsi que particulière-ment pour 2 régions forestières de la province. Les relevés indiquant les fluctuations à moyen et à long terme ont fait l' objet d'une utilisation plus poussée pour cette évaluation. La comparaison entre le premier et le second atlas des oiseaux nicheurs a été particulièrement importante pour pouvoir estimer les fluctuations dans les forêts boréales, mais la fiabilité générale des tendances actuelles dans le nord de la province a été jugée faible compte tenu de la couverture restreinte et du potentiel significatif de biais. Les fluctuations de la plupart des populations d' oiseaux forestiers se sont révélées être stables ou positives pour l' ensemble de la province, ces fluctuations étant au moins aussi positives par rapport aux oiseaux forestiers ailleurs en Amérique du Nord et elles étaient encore plus positives dans l' ensemble par rapport aux oiseaux des milieux agricoles. Néanmoins, les fluctuations des espèces individuelles variaient entre des déclins importants et des accroissements majeurs et quelques oiseaux forestiers ont été ajoutés à la liste des espèces en péril principalement suite à un déclin des populations. Peu de différence a été relevée pour ce qui est des tendances chez les oiseaux forestiers regroupés en fonction de leur habitat ou de leur regroupement migratoire, même si 5 espèces insectivores se nourrissant en vol sont en déclin. Une meilleure étude des territoire...
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