Annual cycle and migration strategies of a habitat specialist, the Tawny Pipit Anthus campestris, revealed by geolocators

Briedis, Martins; Beran, Václav; Hahn, Steffen; Adamík, Peter

doi:10.1007/s10336-015-1313-3

Cited by 27 publications

(23 citation statements)

References 25 publications

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“…The increasing use of miniaturized tracking technology is revealing multiple site use in many migratory bird species (McKinnon et al 2013, Thorup et al 2017). Passerine bird species where only some individuals change site may be common, but is currently only documented for relatively few in the Afro‐Palaearctic flyway (Åkesson et al 2012, Briedis et al 2016, 2018b, Norevik et al 2016, Koleček et al 2018), and Nearctic–Neotropical flyway (Heckscher et al 2011, Delmore et al 2012, Cormier et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Weak migratory connectivity, loop migration and multiple non‐breeding site use in British breeding Whinchats Saxicola rubetra

Burgess

Finch

Border

et al. 2020

Ibis

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Determining the links between breeding populations and the pressures, threats and conditions they experience presents a challenge for the conservation of migratory birds which can use multiple sites separated by hundreds to thousands of kilometres. Furthermore, migratory connectivity – the connections made by migrating individuals between networks of breeding and non‐breeding sites – has important implications for population dynamics. The Whinchat Saxicola rubetra is declining across its range, and tracking data from a single African non‐breeding site implies high migratory spread. We used geolocators to describe the migration routes and non‐breeding areas of 20 Whinchats from three British breeding populations. As expected, migratory spread was high, with birds from the three populations overlapping across a wide area of West Africa. On average, in non‐breeding areas, British breeding Whinchats were located 652 km apart from one another, with some likely to share non‐breeding areas with individuals from breeding populations as far east as Russia. Four males made a direct non‐breeding season movement to a second, more westerly, non‐breeding location in January. Autumn migration was through Iberia and around the western edge of the Sahara Desert, whereas spring migration was more direct, indicating an anticlockwise loop migration. Weak migratory connectivity implies that Whinchat populations are somewhat buffered against local changes in non‐breeding conditions. If non‐breeding season processes have played a role in the species’ decline, then large‐scale drivers are likely to be the cause, although processes operating on migration, or interactions between breeding and non‐breeding processes, cannot be ruled out.

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Section: Discussionmentioning

confidence: 99%

Weak migratory connectivity, loop migration and multiple non‐breeding site use in British breeding Whinchats Saxicola rubetra

Burgess

Finch

Border

et al. 2020

Ibis

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“…However the recent evidence is ambiguous, with a number of studies showing no apparent effect on return rates of the tagged birds [e.g. 31, 32], while some report negative influence [33] including delayed breeding site arrival time and decreased breeding success in the year following the geolocator deployment [34]. Furthermore, the differences in return rates between tagged and control birds seem to vary among sites within the same species [24, 35].…”

Section: Discussionmentioning

confidence: 99%

Cold spell en route delays spring arrival and decreases apparent survival in a long-distance migratory songbird

2017

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BackgroundAdjusting the timing of annual events to gradual changes in environmental conditions is necessary for population viability. However, adaptations to weather extremes are poorly documented in migratory species. Due to their vast seasonal movements, long-distance migrants face unique challenges in responding to changes as they rely on an endogenous circannual rhythm to cue the timing of their migration. Furthermore, the exact mechanisms that explain how environmental factors shape the migration schedules of long-distance migrants are often unknown.ResultsHere we show that long-distance migrating semi-collared flycatchers Ficedula semitorquata delayed the last phase of their spring migration and the population suffered low return rates to breeding sites while enduring a severe cold spell en route. We found that the onset of spring migration in Africa and the timing of Sahara crossing were consistent between early and late springs while the arrival at the breeding site depended on spring phenology at stopover areas in each particular year.ConclusionUnderstanding how environmental stimuli and endogenous circannual rhythms interact can improve predictions of the consequences of climate changes on migratory animals.Electronic supplementary materialThe online version of this article (doi:10.1186/s12898-017-0121-4) contains supplementary material, which is available to authorized users.

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“…Rather than depending largely on size, step length may also be more context dependent and vary with weather conditions and notably wind assistance. In addition, geography may play a role, migrants being more likely to stop just before crossing large ecological barriers such as oceans and deserts (Weber and Houston 1997, Risely et al 2015, Briedis et al 2016 irrespective of the distance flown prior to reaching that barrier.…”

Section: Discussionmentioning

confidence: 99%

Body size shapes inter‐specific migratory behaviour: evidence from individual tracks of long‐distance migratory shorebirds

Zhao

Christie²,

Coleman

et al. 2018

Journal of Avian Biology

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Migration is a common phenomenon across many animal taxa. Understanding how migration scales with body size across species is fundamental in the development of migration theory and in making size-related predictions. Although aerodynamic theory and ecophysiological scaling laws have assisted greatly in generating such predictions, their verifications have been limited by a lack of empirical data across a range of body sizes. The recent development of ultra-light tracking devices and its rapid application to migration now allows us to put theory to the test. We used tracking data of seven closely related migratory sandpiper species (family Scolopacidae) along the East Asian-Australasian Flyway to compare their migratory behaviour when migrating towards the breeding grounds as a function of size (50-750 g). We found a marked decline in migration speed (migration distance divided by total migration duration, including time at stopover sites and in flight) with size. Departure date from the non-breeding (i.e. wintering) ground and arrival date at the breeding ground also scaled negatively with size. Total migration duration, migration distance, total staging duration (the number of days staying at stopover sites plus days preparing, i.e. fuelling, prior to initial migration) and step length (distance covered within one migratory leg) were not significantly related with size. Correction for phylogeny showed consistent results for all variables. Besides improving our fundamental understanding of inter-specific variation in migration behaviours, the finding of a clear scaling with size in migration speed and migration timing highlight differential size related capabilities and constraints of migrants. Migratory birds, including sandpipers, are declining on a global scale and particularly along the East Asian-Australasian Flyway. This notion of size-dependency in migratory traits may have a bearing on their vulnerability to specific environmental disturbances along their flyways.

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Annual cycle and migration strategies of a habitat specialist, the Tawny Pipit Anthus campestris, revealed by geolocators

Cited by 27 publications

References 25 publications

Weak migratory connectivity, loop migration and multiple non‐breeding site use in British breeding Whinchats Saxicola rubetra

Weak migratory connectivity, loop migration and multiple non‐breeding site use in British breeding Whinchats Saxicola rubetra

Cold spell en route delays spring arrival and decreases apparent survival in a long-distance migratory songbird

Body size shapes inter‐specific migratory behaviour: evidence from individual tracks of long‐distance migratory shorebirds

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