Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis
Measurements in 10‐s intervals by a tracking radar showed average speeds of about 25 ms ‐1 for a Peregrine Falcon Falco peregrinus and a Goshawk Accipiter gentilis during four stoops lasting 40–110 s, with angles of dive between 13 o and 64 o , and involving height losses between 450 and 1080 m. Max...
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Online Access: | http://dx.doi.org/10.1111/j.1474-919x.1987.tb03207.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1987.tb03207.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1987.tb03207.x |
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crwiley:10.1111/j.1474-919x.1987.tb03207.x 2024-09-15T17:34:32+00:00 Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis ALERSTAM, THOMAS 1987 http://dx.doi.org/10.1111/j.1474-919x.1987.tb03207.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1987.tb03207.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1987.tb03207.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 129, issue S1, page 267-273 ISSN 0019-1019 1474-919X journal-article 1987 crwiley https://doi.org/10.1111/j.1474-919x.1987.tb03207.x 2024-08-30T04:10:12Z Measurements in 10‐s intervals by a tracking radar showed average speeds of about 25 ms ‐1 for a Peregrine Falcon Falco peregrinus and a Goshawk Accipiter gentilis during four stoops lasting 40–110 s, with angles of dive between 13 o and 64 o , and involving height losses between 450 and 1080 m. Maximum speeds during 10‐s intervals were between 31 and 39 ms ‐1 in the Peregrine Falcon, and close to 30 ms ‐1 in the Goshawk. The observed speeds are well below the maximum possible terminal speeds in steep or vertical dives according to theoretical estimation. By adopting a moderate stooping speed, raptors may gain in hunting precision. Article in Journal/Newspaper Accipiter gentilis Falco peregrinus peregrine falcon Wiley Online Library Ibis 129 267 273 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Measurements in 10‐s intervals by a tracking radar showed average speeds of about 25 ms ‐1 for a Peregrine Falcon Falco peregrinus and a Goshawk Accipiter gentilis during four stoops lasting 40–110 s, with angles of dive between 13 o and 64 o , and involving height losses between 450 and 1080 m. Maximum speeds during 10‐s intervals were between 31 and 39 ms ‐1 in the Peregrine Falcon, and close to 30 ms ‐1 in the Goshawk. The observed speeds are well below the maximum possible terminal speeds in steep or vertical dives according to theoretical estimation. By adopting a moderate stooping speed, raptors may gain in hunting precision. |
format |
Article in Journal/Newspaper |
author |
ALERSTAM, THOMAS |
spellingShingle |
ALERSTAM, THOMAS Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis |
author_facet |
ALERSTAM, THOMAS |
author_sort |
ALERSTAM, THOMAS |
title |
Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis |
title_short |
Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis |
title_full |
Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis |
title_fullStr |
Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis |
title_full_unstemmed |
Radar observations of the stoop of the Peregrine Falcon Falco peregrinus and the Goshawk Accipiter gentilis |
title_sort |
radar observations of the stoop of the peregrine falcon falco peregrinus and the goshawk accipiter gentilis |
publisher |
Wiley |
publishDate |
1987 |
url |
http://dx.doi.org/10.1111/j.1474-919x.1987.tb03207.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1987.tb03207.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1987.tb03207.x |
genre |
Accipiter gentilis Falco peregrinus peregrine falcon |
genre_facet |
Accipiter gentilis Falco peregrinus peregrine falcon |
op_source |
Ibis volume 129, issue S1, page 267-273 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.1987.tb03207.x |
container_title |
Ibis |
container_volume |
129 |
container_start_page |
267 |
op_container_end_page |
273 |
_version_ |
1810489191136493568 |