Prolonged stopover and consequences of migratory strategy on local-scale movements within a regional songbird staging area

Smetzer, Jennifer; King, David I.

doi:10.1642/auk-18-4.1

Cited by 12 publications

(12 citation statements)

References 78 publications

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“…The departure bearing exhibited by most Bank Swallows suggests that after these individuals leave, they begin travelling in a direction consistent with their migratory routes with little support for broad-scale postbreeding movements, at least in the areas covered by the Motus network. This is in contrast to other passerine species tracked during fall migration in this region that have more extensive postbreeding movements throughout the northeast (e.g., Blackpoll Warbler Setophaga striata, Red-eyed Vireo Vireo olivaceus, Taylor 2015, Smetzer andKing 2018).…”

Section: Discussioncontrasting

confidence: 68%

The fall migratory movements of Bank Swallows, Riparia riparia: fly-and-forage migration?

Imlay¹,

Saldanha²,

Taylor³

2020

ACE

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Section: Discussioncontrasting

confidence: 68%

The fall migratory movements of Bank Swallows, Riparia riparia: fly-and-forage migration?

Imlay¹,

Saldanha²,

Taylor³

2020

ACE

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“…S1). This extended coastal stopover is similar to that found for Blackpolls further north along the Gulf of Maine (Brown and Taylor , Smetzer and King ). All Blackpolls then embarked on a transoceanic movement to the north coast of South America that took an average of ~ 60 h (range = 48–96 h) to complete (Appendix : Table S1).…”

supporting

confidence: 85%

A boreal songbird's 20,000 km migration across North America and the Atlantic Ocean

DeLuca

Woodworth

Mackenzie

et al. 2019

Ecology

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“…Either of these resource-driven mechanisms could generate the increase in passage duration we found in fall. In the future, more extensive datasets on landscape-level phenology of native and invasive plants (e.g., National Phenology Network), and knowledge of fine-scale movements of birds across the stopover landscape will help to contextualize our findings (Smetzer & King, 2018).…”

Section: Resultsmentioning

confidence: 99%

Non-parallel changes in songbird migration timing are not explained by changes in stopover duration

Dorian

Lloyd-Evans

Reed

2020

PeerJ

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Shifts in the timing of animal migration are widespread and well-documented; however, the mechanism underlying these changes is largely unknown. In this study, we test the hypothesis that systematic changes in stopover duration—the time that individuals spend resting and refueling at a site—are driving shifts in songbird migration timing. Specifically, we predicted that increases in stopover duration at our study site could generate increases in passage duration—the number of days that a study site is occupied by a particular species—by changing the temporal breadth of observations and vise versa. We analyzed an uninterrupted 46-year bird banding dataset from Massachusetts, USA using quantile regression, which allowed us to detect changes in early-and late-arriving birds, as well as changes in passage duration. We found that median spring migration had advanced by 1.04 days per decade; that these advances had strengthened over the last 13 years; and that early-and late-arriving birds were advancing in parallel, leading to negligible changes in the duration of spring passage at our site (+0.07 days per decade). In contrast, changes in fall migration were less consistent. Across species, we found that median fall migration had delayed by 0.80 days per decade, and that changes were stronger in late-arriving birds, leading to an average increase in passage duration of 0.45 days per decade. Trends in stopover duration, however, were weak and negative and, as a result, could not explain any changes in passage duration. We discuss, and provide some evidence, that changes in population age-structure, cryptic geographic variation, or shifts in resource availability are consistent with increases in fall passage duration. Moreover, we demonstrate the importance of evaluating changes across the entire phenological distribution, rather than just the mean, and stress this as an important consideration for future studies.

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Prolonged stopover and consequences of migratory strategy on local-scale movements within a regional songbird staging area

Cited by 12 publications

References 78 publications

The fall migratory movements of Bank Swallows, Riparia riparia: fly-and-forage migration?

The fall migratory movements of Bank Swallows, Riparia riparia: fly-and-forage migration?

A boreal songbird's 20,000 km migration across North America and the Atlantic Ocean

Non-parallel changes in songbird migration timing are not explained by changes in stopover duration

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