Mid-winter movements of up to several hundreds of kilometres are typical for many migratory bird species wintering in Africa. Unpredictable temporary food concentrations are thought to result in random movements of such birds, whereas resightings and recoveries of marked birds suggest some degree of site fidelity. Only detailed (e.g. satellite) tracking of individual migrants can reveal the rel...

Individuals often considerably differ in the timing of their life-cycle events, with major consequences for individual fitness, and, ultimately, for population dynamics. Phenological variation can arise from genetic effects but also from epigenetic modifications in DNA expression and translation. Here, we tested if CpG methylation at the poly-Q and 5'-UTR loci of the photoperiodic Clock gene pr...

GI JEV isolates from India share close genetic relationship with GI strains from Japan and Korea. In India, JEV neutralizing antibodies have been detected in 179 (34.8%) of 514 birds, including pond herons and cattle egrets, indicating a possible role in virus maintenance (9). Large perennial lakes, swamps, and rice fi elds provide a wintering and staging ground for several migratory waterfowl;...

Influenza A virus infects a large proportion of the human population annually, sometimes leading to the deaths of millions. The biotic cycles of infection are well characterized in the literature, including in studies of populations of humans, poultry, swine, and migratory waterfowl. However, there are few studies of abiotic reservoirs for this virus. Here, we report the preservation of influen...

Migratory divides are contact zones between breeding populations that use divergent migratory routes and have been described in a variety of species. These divides are of major importance to evolution, ecology and conservation but have been identified using limited band recovery data and/or indirect methods. Data from band recoveries and mitochondrial haplotypes suggested that inland and coasta...

In birds, fat accumulation before and during migration has been shown to be endogenously controlled and tuned by, among other factors, the Earth's magnetic field. However, our knowledge about the influence of the geomagnetic field on the fuelling in migrating birds is still limited to just a few nocturnally migrating passerine species. In order to study if variations of the magnetic field can a...

Identifying the factors that infl uence geographic range limits can illustrate the various ecological, physiological, and evolutionary constraints imposed on a species. Th e range limits of migratory birds are particularly challenging to study as they occur in disjunct regions at diff erent times of the year, which can impose diff erent constraints. Travel between breeding and wintering regions...

Purpose. Analysis of the avifauna on territory water treatment facilities to assess their importance in support and conservation birds at Kharkiv region. Methods. Field survey: records permanent routes. Statistical analysis. Results. Avifauna (hereinafter WTF) region 2019 - 2023 amounted 195 species from 17 orders 44 families. Passeriformes dominated (37.7%; n=159), Charadriiformes (16.6%) Anse...