Year-round spatiotemporal distribution of the enigmatic Semi-collared Flycatcher Ficedula semitorquata

Briedis, Martins; Träff, Johan; Hahn, Steffen; Ilieva, Mihaela; Král, Miroslav; Peev, Strahil; Adamík, Peter

doi:10.1007/s10336-016-1334-6

Cited by 14 publications

(6 citation statements)

References 10 publications

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“…In the closely related pied flycatcher Ficedula hypoleuca , spring arrival largely depends on the departure time from Africa, rather than migration speed (Ouwehand & Both, ). On the contrary, semicollared flycatcher Ficedula semitorquata spring arrival at breeding sites in Bulgaria differed significantly between years and was related to the environmental conditions en route and spring green‐up at the breeding site (Briedis, Hahn, & Adamík, ; Briedis, Träff et al., ). Thus, migration speed through the last leg of migration reflected the arrival time more closely than departure time in semicollared flycatchers.…”

Section: Discussionmentioning

confidence: 99%

Finish with a sprint: Evidence for time‐selected last leg of migration in a long‐distance migratory songbird

Briedis

Hahn

Krist

et al. 2018

Ecology and Evolution

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Under time‐selected migration, birds should choose a strategy for outcompeting rivals over securing access to prime resources at the final destination. Thus, migration can be viewed as a race among individuals where winners are arriving first when conditions are suitable. The sprint migration hypothesis predicts that individuals shift from maximum sustained speed to a final burst of sprint to shorten the transition from migration to breeding (Alerstam, 2006). In this study, we test the hypothesis of a final sprint migration in a long‐distance Afro‐Palearctic migrant, the collared flycatcher Ficedula albicollis, during autumn and spring, and compare migration strategies between the seasons. In both seasons, collared flycatchers evidently exhibited sprint migration by increasing their overall speed over the last leg of migration after the Sahara crossing. This phenomenon was more pronounced in spring, contributing to overall faster spring migration and possibly highlighting higher importance for early arrival at the breeding grounds. In both seasons and particularly in spring, late departing individuals flew at a faster rate, partially being able to catch up with their early departing conspecifics. Differential fueling strategies may play an important role in determining migration speed, especially during the early stages of the migration, and might explain the observed differences in migration speeds between late and early departing individuals. Our findings suggest competition for early arrival at the breeding and at the nonbreeding destinations alike. Sprint migration might be an appropriate strategy to gain advantage over conspecifics and settle in prime territories as well as to cope with the increasingly earlier springs at high latitudes.

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Section: Discussionmentioning

confidence: 99%

Finish with a sprint: Evidence for time‐selected last leg of migration in a long‐distance migratory songbird

Briedis

Hahn

Krist

et al. 2018

Ecology and Evolution

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“…Summary statistics of data supporting the conclusions of this article has previously been published [13] and raw data are also included in the additional information files (Additional file 2) of this published article.…”

Section: Authors’ Contributionsmentioning

confidence: 99%

“…Flycatchers’ peak arrival period at their breeding range extends from the end of March to the beginning of April [13]. In Southeastern Europe in 2014, this period was the warmest on record since 2000, followed by an exceptional cold spring in 2015 with temperatures well below the long-term average (Fig.…”

Section: Introductionmentioning

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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“…Several recent studies have looked into sex-biased migration timing also at other annual stages, e.g. [21,[27][28][29][30][31][32][33] frequently showing earlier male departure from the non-breeding sites in spring, but ambiguous patterns for autumn migration. However, sample sizes of such case studies are often small, and confirmation of sex biases in migration timing (or lack thereof) may often be masked by low statistical power.…”

Section: Introductionmentioning

confidence: 99%

A full annual perspective on sex-biased migration timing in long-distance migratory birds

et al. 2019

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In many taxa, the most common form of sex-biased migration timing is protandry—the earlier arrival of males at breeding areas. Here we test this concept across the annual cycle of long-distance migratory birds. Using more than 350 migration tracks of small-bodied trans-Saharan migrants, we quantify differences in male and female migration schedules and test for proximate determinants of sex-specific timing. In autumn, males started migration about 2 days earlier, but this difference did not carry over to arrival at the non-breeding sites. In spring, males on average departed from the African non-breeding sites about 3 days earlier and reached breeding sites ca 4 days ahead of females. A cross-species comparison revealed large variation in the level of protandry and protogyny across the annual cycle. While we found tight links between individual timing of departure and arrival within each migration season, only for males the timing of spring migration was linked to the timing of previous autumn migration. In conclusion, our results demonstrate that protandry is not exclusively a reproductive strategy but rather occurs year-round and the two main proximate determinants for the magnitude of sex-biased arrival times in autumn and spring are sex-specific differences in departure timing and migration duration.

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Year-round spatiotemporal distribution of the enigmatic Semi-collared Flycatcher Ficedula semitorquata

Cited by 14 publications

References 10 publications

Finish with a sprint: Evidence for time‐selected last leg of migration in a long‐distance migratory songbird

Finish with a sprint: Evidence for time‐selected last leg of migration in a long‐distance migratory songbird

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

A full annual perspective on sex-biased migration timing in long-distance migratory birds

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