Are movements of daytime and nighttime passerine migrants as different as day and night?

Michalik, Bianca; Brust, Vera; Hüppop, Ommo

doi:10.1002/ece3.6704

Cited by 13 publications

(10 citation statements)

References 94 publications

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“…This finding is especially interesting as all except one of the species investigated here are mainly nocturnal migrants, which have often been described to be less sensitive to the overflown landscape as compared to diurnal migrants (Lack 1963;Eastwood 1967;Bruderer and Liechti 1998;Diehl et al 2003). The coastlines still seem to have a leading line effect for nocturnal migrants, too (Buurma 1995;Brust et al 2019;Michalik et al 2020), which has also been observed in other regions (Richardson 1978).…”

Section: Discussionsupporting

confidence: 68%

“…west of 8.08° E (Fig. 1), it had most likely migrated offshore (Brust et al 2019;Michalik et al 2020). 'Arrivals' further east, at the southern North Sea coast, i.e.…”

Section: Analyses Of Radio-telemetry Datamentioning

confidence: 99%

“…These observations suggest that great amounts of land birds migrate near or along coastal margins (Williams and Williams 1990). Many birds refrain from direct crossing of water bodies, such as the Gulf of Maine (Drury and Keith 1962), the Gulf of Mexico (Zenzal et al 2021) or the Mediterranean Sea (Bruderer and Liechti 1998), sometimes even of crossing smaller bays or straits (Nilsson and Sjöberg 2016;Brust et al 2019;Becciu et al 2020;Michalik et al 2020). Some birds have even been observed to turn back to the coast after flying out to sea (Richardson 1978;Bruderer and Liechti 1998;Fortin et al 1999;Diehl et al 2003;Archibald et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the detection of more than single individuals over larger areas and longer times strongly depends on the density and expansion of the receiver network. Here, we used a large-scale automated radio-telemetry array covering the German North Sea coast and islands (Brust et al 2019;Michalik et al 2020) to track individual flight routes of ten species of songbirds across the German Bight during autumn migration. By radio-tagging these birds at coastal stopover sites we wished to shed light on actual proportions of individuals taking offshore-oriented routes as compared to those following along the coastline in our study area.…”

Section: Introductionmentioning

confidence: 99%

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Underestimated scale of songbird offshore migration across the south-eastern North Sea during autumn

Brust

Hüppop

2021

J Ornithol

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Flights over open water can be challenging for migrating songbirds. Despite numerous observations of songbirds migrating over remote islands, virtually nothing is known about the proportion of songbirds risking to fly offshore rather than to follow the coastline. By means of large-scale automated radio-telemetry, we individually tracked songbirds during their autumn migration through the German Bight area in the south-eastern North Sea. Our tracking network facilitated the recording of movement patterns over the bay and, for the first time, the estimation of the proportions of individuals embarking on offshore flights from their coastal stopover sites. Our data are consistent with previous observations of decreasing migration densities from nearshore to offshore, i.e. from east to west in autumn. Still, we revealed a considerable proportion of 25% of birds flying offshore. The tendency to fly offshore decreased from west to south migrants, which is in line with optimal bird migration theory. Among south-west migrating species, which also comprise the vast majority of songbird species migrating through the German Bight area, thrushes showed the highest proportions of offshore flights. Considering the recent and ongoing increase of artificial offshore structures, our results suggest that some species or species groups might especially face an increased risk of being negatively affected.

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Section: Discussionsupporting

confidence: 68%

“…west of 8.08° E (Fig. 1), it had most likely migrated offshore (Brust et al 2019;Michalik et al 2020). 'Arrivals' further east, at the southern North Sea coast, i.e.…”

Section: Analyses Of Radio-telemetry Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Underestimated scale of songbird offshore migration across the south-eastern North Sea during autumn

Brust

Hüppop

2021

J Ornithol

Self Cite

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“…As the diurnal E. balteatus thus adopts night-time migration in a similar way as certain dragonfly or beetle species (Feng et al, 2006; Anderson, 2009), our work shines new light on the migration strategies of these globally important beneficial insects. As such, certain hoverfly species likely possess specific behavioral traits to undertake both nocturnal and diurnal migration (Michalik et al, 2020). Given the major ecological implications of such ‘dual’ migration strategy e.g., in terms of pollination or pest control, this knowledge gap urgently needs to be filled.…”

Section: Discussionmentioning

confidence: 99%

Windborne migration amplifies insect-mediated pollination services

Jia

Yong-qiang

et al. 2022

Preprint

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Worldwide, hoverflies (Syrphidae: Diptera) provide crucial ecosystem services (ES) such as pollination and biological pest control. Although many hoverfly species exhibit migratory behavior, the spatiotemporal facets of these movement dynamics and their ES implications are poorly understood. In this study, we use long-term (16 yr) trapping records, trajectory analysis and intrinsic (i.e., isotope, genetic, pollen) markers to describe migration patterns of the hoverfly Episyrphus balteatus in China. Our work reveals long-range, windborne migration with spring migrants originating in northern China and exhibiting return migration during autumn. Given the substantial night-time dispersal of E. balteatus, this species possibly adopts a 'dual' migration strategy. The extensive genetic mixing and high genetic diversity of E. balteatus populations underscore its adaptive capacity to environmental disturbances e.g., climate change. Pollen markers and molecular gut-analysis further illuminate how E. balteatus visits min. 1,012 flowering plant species (39 orders) over space and time. By thus delineating E. balteatus trans-regional movements and pollination networks, we advance our understanding of its migration ecology and facilitate the design of targeted strategies to conserve and enhance its ecosystem services.

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The urge to breed early: Similar responses to environmental conditions in short‐ and long‐distance migrants during spring migration

Rüppel

Hüppop

Schmaljohann

et al. 2023

Ecology and Evolution

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Birds migrating different distances experience different temporal, energetic, physiological, and physical constraints throughout migration, which is reflected in their migration strategy. Consequently, we predict different behavioral decisions to similar environmental cues between short-and long-distance migrants, which has been documented for autumn migration. Here, we focus on the question whether tradeoff decisions regarding departure, routing, and landing when alternating between migratory endurance flights and stopovers also differ during spring migration. As early arrivals at the breeding grounds should be ultimately favored regardless of migration distance, selection may favor more similar behavioral decisions in spring than in autumn. We radio-tagged short-and long-distance migratory songbirds at stopover sites along the German North Sea coast during spring and automatically tracked their migratory behavior using a large-scale network of receiver stations. Once departed, birds could either cross the sea or detour along the coast. We corrected for spatially biased detection data, using a hierarchical multistate model to assess how birds respond to variation in environmental conditions in their day-to-day departure decisions and route selection. The day-to-day departure probability was higher in long-distance migrants independently of the routing decision. Irrespective of migration distance, all species more likely departed under light winds and rainless conditions, while the influence of air pressure change and relative humidity was species-specific. By accounting for detection probabilities, we estimated that about half of all individuals of each species crossed the sea but did not find differences between short-and longdistance migrants. Offshore flights were more likely when winds blew offshore and began earlier within the night compared with onshore flights. Our results suggest that selection more similarly affects birds of different migration distances in spring than in autumn. These findings put the focus toward how ultimate mechanisms may shape departure and routing decisions differently between migration seasons.

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Are movements of daytime and nighttime passerine migrants as different as day and night?

Cited by 13 publications

References 94 publications

Underestimated scale of songbird offshore migration across the south-eastern North Sea during autumn

Underestimated scale of songbird offshore migration across the south-eastern North Sea during autumn

Windborne migration amplifies insect-mediated pollination services

The urge to breed early: Similar responses to environmental conditions in short‐ and long‐distance migrants during spring migration

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