Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment
Whereas most migratory animals, such as many birds of prey, return to the same breeding area each summer, nomadic breeders search over large distances to locate breeding areas that vary greatly in location from year to year. Nomadic breeders are assumed to extensively sample patch quality before sel...
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Online Access: | http://dx.doi.org/10.1111/ibi.12950 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12950 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ibi.12950 |
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crwiley:10.1111/ibi.12950 2024-06-02T08:04:38+00:00 Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment Brown, Andrea McCabe, Rebecca A. Therrien, Jean‐François Wiebe, Karen L. Weidensaul, Scott Brinker, David Gauthier, Gilles Elliott, Kyle H. Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada 2021 http://dx.doi.org/10.1111/ibi.12950 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12950 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ibi.12950 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 163, issue 4, page 1271-1281 ISSN 0019-1019 1474-919X journal-article 2021 crwiley https://doi.org/10.1111/ibi.12950 2024-05-03T11:11:14Z Whereas most migratory animals, such as many birds of prey, return to the same breeding area each summer, nomadic breeders search over large distances to locate breeding areas that vary greatly in location from year to year. Nomadic breeders are assumed to extensively sample patch quality before selecting a summer settlement site (e.g. breeding site) with a high abundance of prey. In addition, patch selection during migration might vary, with immature birds sampling the summer environment for the first time. Here, we examined the migratory movements of a nomadic breeder, the Snowy Owl, to determine whether there are differences in phenology among age and sex classes, and where stopovers occur along their migratory journey. Each owl ( n = 24) was equipped with a GPS‐GSM transmitter during the overwintering period in the USA and Canada from 2014 to 2018. Movement patterns followed a two‐process Poisson distribution, allowing us to separate stopovers from directional flights (i.e. migration). Adults completed migration earlier than immatures, with no difference in number of stopovers or time spent at each stopover. Snowy Owls had a higher probability of having a stopover at the beginning of their migration than at the end. Moreover, stopovers occurred primarily on frozen waterbodies more suitable for foraging or roosting outside of the summer range. We conclude that Snowy Owls use stopovers primarily to build up reserves or to rest during migration and they can potentially select appropriate summer settlement sites via short overflights without extensive sampling of patches during lengthy stopovers. Article in Journal/Newspaper Bubo scandiacus snowy owl Wiley Online Library Canada Ibis |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Whereas most migratory animals, such as many birds of prey, return to the same breeding area each summer, nomadic breeders search over large distances to locate breeding areas that vary greatly in location from year to year. Nomadic breeders are assumed to extensively sample patch quality before selecting a summer settlement site (e.g. breeding site) with a high abundance of prey. In addition, patch selection during migration might vary, with immature birds sampling the summer environment for the first time. Here, we examined the migratory movements of a nomadic breeder, the Snowy Owl, to determine whether there are differences in phenology among age and sex classes, and where stopovers occur along their migratory journey. Each owl ( n = 24) was equipped with a GPS‐GSM transmitter during the overwintering period in the USA and Canada from 2014 to 2018. Movement patterns followed a two‐process Poisson distribution, allowing us to separate stopovers from directional flights (i.e. migration). Adults completed migration earlier than immatures, with no difference in number of stopovers or time spent at each stopover. Snowy Owls had a higher probability of having a stopover at the beginning of their migration than at the end. Moreover, stopovers occurred primarily on frozen waterbodies more suitable for foraging or roosting outside of the summer range. We conclude that Snowy Owls use stopovers primarily to build up reserves or to rest during migration and they can potentially select appropriate summer settlement sites via short overflights without extensive sampling of patches during lengthy stopovers. |
author2 |
Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Brown, Andrea McCabe, Rebecca A. Therrien, Jean‐François Wiebe, Karen L. Weidensaul, Scott Brinker, David Gauthier, Gilles Elliott, Kyle H. |
spellingShingle |
Brown, Andrea McCabe, Rebecca A. Therrien, Jean‐François Wiebe, Karen L. Weidensaul, Scott Brinker, David Gauthier, Gilles Elliott, Kyle H. Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment |
author_facet |
Brown, Andrea McCabe, Rebecca A. Therrien, Jean‐François Wiebe, Karen L. Weidensaul, Scott Brinker, David Gauthier, Gilles Elliott, Kyle H. |
author_sort |
Brown, Andrea |
title |
Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment |
title_short |
Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment |
title_full |
Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment |
title_fullStr |
Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment |
title_full_unstemmed |
Nomadic breeders Snowy Owls ( Bubo scandiacus) do not use stopovers to sample the summer environment |
title_sort |
nomadic breeders snowy owls ( bubo scandiacus) do not use stopovers to sample the summer environment |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/ibi.12950 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12950 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ibi.12950 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Bubo scandiacus snowy owl |
genre_facet |
Bubo scandiacus snowy owl |
op_source |
Ibis volume 163, issue 4, page 1271-1281 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ibi.12950 |
container_title |
Ibis |
_version_ |
1800749279857344512 |