Evidence map›Paper›PMID 26065914›Full record

ArticlePloS one2015

A Continent-Wide Migratory Divide in North American Breeding Barn Swallows (Hirundo rustica).

Keith A Hobson, Kevin J Kardynal, Steven L Van Wilgenburg, Gretchen Albrecht, Antonio Salvadori, Michael D Cadman, Felix Liechti, James W Fox

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
8.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 78 citations in OpenAlex.

  1. Article
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  5. Multi-isotope (δMovement ecology · 2023
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  13. Population trends inProceedings of the National Academy of Sciences of the United States of America · 2018
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 3 countries.

Keith A HobsonScience and Technology Branch, Environment Canada, Saskatoon, Saskatchewan, Canada.
Kevin J KardynalScience and Technology Branch, Environment Canada, Saskatoon, Saskatchewan, Canada.
Steven L Van WilgenburgScience and Technology Branch, Environment Canada, Saskatoon, Saskatchewan, Canada.
Gretchen AlbrechtWoodland Park Zoo, Seattle, Washington, United States of America.
Antonio Salvadori17 Colborn St., Guelph, Ontario, Canada.
Michael D CadmanCanadian Wildlife Service, Environment Canada, Burlington, Ontario, Canada.
Felix LiechtiSwiss Ornithological Institute, Sempach, Switzerland.
James W FoxMigrate Technology, Cambridge, United Kingdom.
Environment and Climate Change Canada · CALincoln Park Zoo · USSwiss Ornithological Institute · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Populations of most North American aerial insectivores have undergone steep population declines over the past 40 years but the relative importance of factors operating on breeding, wintering, or stopover sites remains unknown. We used archival light-level geolocators to track the phenology, movements and winter locations of barn swallows (Hirdundo rustica; n = 27) from populations across North America to determine their migratory connectivity. We identified an east-west continental migratory divide for barn swallows with birds from western regions (Washington State, USA (n = 8) and Saskatchewan, Canada (n = 5)) traveling shorter distances to wintering areas ranging from Oregon to northern Colombia than eastern populations (Ontario (n = 3) and New Brunswick (n = 10), Canada) which wintered in South America south of the Amazon basin. A single swallow from a stable population in Alabama shared a similar migration route to eastern barn swallows but wintered farther north in northeast Brazil indicating a potential leap frog pattern migratory among eastern birds. Six of 9 (67%) birds from the two eastern populations and Alabama underwent a loop migration west of fall migration routes including around the Gulf of Mexico travelling a mean of 2,224 km and 722 km longer on spring migration, respectively. Longer migration distances, including the requirement to cross the Caribbean Sea and Gulf of Mexico and subsequent shorter sedentary wintering periods, may exacerbate declines for populations breeding in northeastern North America.

Indexed as

Animal MigrationAnimalsBreedingNorth AmericaSeasonsSwallows

Identifiers

PMID26065914
PMCPMC4466147
OpenAlexW1576773992

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.