Results 31 to 40 of about 1,898,413 (348)
Journal of Field Ornithology, 2022 We examined variability in adult annual survival rate estimates for 33 breeding bird species, using 2011–2019 data from a 38-station Monitoring Avian Productivity and Survivorship (MAPS) program in Alberta, Canada.
Danielle R. Kaschube +5 more
doaj
The Costs of Freely Granting Specific Performance [PDF]
, 1982 For thousands of years the migratory birds has travelled across the earth in the same directions and returns to the same places generation through generation.
Muris, Timothy J.
core +3 more sources
Secretary bird optimization algorithm: a new metaheuristic for solving global optimization problems
Artificial Intelligence ReviewThis study introduces a novel population-based metaheuristic algorithm called secretary bird optimization algorithm (SBOA), inspired by the survival behavior of secretary birds in their natural environment.
Youfa Fu, Dan Liu, Jiadui Chen, Ling He
semanticscholar +1 more source
Movement Ecology, 2018 Background Over the past decade, the miniaturisation of animal borne tags such as geolocators and GPS-transmitters has revolutionized our knowledge of the whereabouts of migratory species.
Felix Liechti +5 more
doaj +1 more source
Application of Deep-Learning Methods to Bird Detection Using Unmanned Aerial Vehicle Imagery
Italian National Conference on Sensors, 2019 Wild birds are monitored with the important objectives of identifying their habitats and estimating the size of their populations. Especially in the case of migratory bird, they are significantly recorded during specific periods of time to forecast any ...
Suk-Ju Hong +4 more
semanticscholar +1 more source
Convolutional recurrent neural networks for bird audio detection [PDF]
European Signal Processing Conference, 2017 Bird sounds possess distinctive spectral structure which may exhibit small shifts in spectrum depending on the bird species and environmental conditions.
Emre Çakir +4 more
semanticscholar +1 more source
Time Budget and Diet of the Booted Eagles in the Breeding Season in Xinjiang, China
Пернатые хищники и их охрана, 2017 During the breeding seasons of 2010-2016, we have found seven nests of the Booted Eagle (Hieraaetus pennatus) in Xinjiang, the west of China. We used a method of focal sampling and infrared cameras to continually observe behaviors and nestlings’ growth ...
Daoning Wu +6 more
doaj +1 more source
Quantifying multiple breeding vital rates in two declining grassland songbirds
Avian Conservation and Ecology, 2021 Many studies of reproductive success in North American songbirds have focused on nesting success, while relatively few have evaluated breeding-season adult survival and post-fledging survival.
Jacy S. Bernath-Plaisted +7 more
doaj
Vaccines, 2023 The hepatitis B virus is a public health threat, chronically infecting over 240 million persons worldwide. The hepatitis B vaccine is 90% effective in preventing perinatal transmission if the first dose is given within the first 24 h of life, followed by
Shivon Belle Jarvis +2 more
doaj +1 more source