Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992
In January 1989 and 1990 simultaneous Hen Harrier Circus cyaneus roost counts were carried out in the Flemish coastal polders. In the following winters (1990-'91 and 1991-'92), similar counts were organized on five different dates as part of the "Hen Harrier winter Roost Survey"...
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Online Access: | https://data.inbo.be/pureportal/en/publications/resultaten-van-slaapplaatstellingen-van-blauwe-kiekendieven-circus-cyaneus-in-de-kustpolders-en-het-krekengebied-van-novlaanderen-in-de-winters-19901991-en-19911992(26697c69-7701-449e-859a-d4f664f3635b).html https://data.inbo.be/purews/files/192693/239679.pdf |
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ftonapublicatio:oai:pure.atira.dk:publications/26697c69-7701-449e-859a-d4f664f3635b 2023-05-15T15:55:33+02:00 Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 Seys, J 1992 application/pdf https://data.inbo.be/pureportal/en/publications/resultaten-van-slaapplaatstellingen-van-blauwe-kiekendieven-circus-cyaneus-in-de-kustpolders-en-het-krekengebied-van-novlaanderen-in-de-winters-19901991-en-19911992(26697c69-7701-449e-859a-d4f664f3635b).html https://data.inbo.be/purews/files/192693/239679.pdf nld dut info:eu-repo/semantics/openAccess Seys , J 1992 , ' Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 ' Mergus , vol 6 , blz. 229-241 . article 1992 ftonapublicatio 2016-06-23T19:11:51Z In January 1989 and 1990 simultaneous Hen Harrier Circus cyaneus roost counts were carried out in the Flemish coastal polders. In the following winters (1990-'91 and 1991-'92), similar counts were organized on five different dates as part of the "Hen Harrier winter Roost Survey" of the BTO IR. Clarke). The polder area of N.E.-Flanders was counted too. This paper provides a brief outline of these censuses. 16 roosts were visited in 1990-'91 and 12 ones in 1991-'92. Among them 10 and 7 ones were at least once occupied. The most important roost is and remains the Blankaart in Woumen. The next important ones are the Zwin in Knokke and the Oostpolder-kreek in Sint-Jan-in-Eremo. The numbers of the Hiddle Coast are traditionally low: only a few scattered specimen staying over in the Rattevalle or the Kleine Keignaert. The total numbers of January 1991 were 53-57. In January 199233-38 specimen were counted. In comparison to the fairly high numbers of the previous winter, 1991-'92 has low ones. The size of wintering Hen Harriers in het Flemish coastal polders can be estimated at 35-100 specimen. To this, one must add the 5-10 ones in the marshland of N.E.-Flanders. These relative high numbers in comparison to results of neighbouring countries, stress the great importance of our polders for Hen Harrier. Further investigation is necessary in order to find a solution for unresolved questions concerning winter distribution of this species and therefore colour-marking study can play a major role. Article in Journal/Newspaper Circus cyaneus Research Institute Nature and Forest: Research outputs |
institution |
Open Polar |
collection |
Research Institute Nature and Forest: Research outputs |
op_collection_id |
ftonapublicatio |
language |
Dutch |
description |
In January 1989 and 1990 simultaneous Hen Harrier Circus cyaneus roost counts were carried out in the Flemish coastal polders. In the following winters (1990-'91 and 1991-'92), similar counts were organized on five different dates as part of the "Hen Harrier winter Roost Survey" of the BTO IR. Clarke). The polder area of N.E.-Flanders was counted too. This paper provides a brief outline of these censuses. 16 roosts were visited in 1990-'91 and 12 ones in 1991-'92. Among them 10 and 7 ones were at least once occupied. The most important roost is and remains the Blankaart in Woumen. The next important ones are the Zwin in Knokke and the Oostpolder-kreek in Sint-Jan-in-Eremo. The numbers of the Hiddle Coast are traditionally low: only a few scattered specimen staying over in the Rattevalle or the Kleine Keignaert. The total numbers of January 1991 were 53-57. In January 199233-38 specimen were counted. In comparison to the fairly high numbers of the previous winter, 1991-'92 has low ones. The size of wintering Hen Harriers in het Flemish coastal polders can be estimated at 35-100 specimen. To this, one must add the 5-10 ones in the marshland of N.E.-Flanders. These relative high numbers in comparison to results of neighbouring countries, stress the great importance of our polders for Hen Harrier. Further investigation is necessary in order to find a solution for unresolved questions concerning winter distribution of this species and therefore colour-marking study can play a major role. |
format |
Article in Journal/Newspaper |
author |
Seys, J |
spellingShingle |
Seys, J Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 |
author_facet |
Seys, J |
author_sort |
Seys, J |
title |
Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 |
title_short |
Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 |
title_full |
Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 |
title_fullStr |
Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 |
title_full_unstemmed |
Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 |
title_sort |
resultaten van slaapplaatstellingen van blauwe kiekendieven circus cyaneus in de kustpolders en het krekengebied van no-vlaanderen in de winters 1990-1991 en 1991-1992 |
publishDate |
1992 |
url |
https://data.inbo.be/pureportal/en/publications/resultaten-van-slaapplaatstellingen-van-blauwe-kiekendieven-circus-cyaneus-in-de-kustpolders-en-het-krekengebied-van-novlaanderen-in-de-winters-19901991-en-19911992(26697c69-7701-449e-859a-d4f664f3635b).html https://data.inbo.be/purews/files/192693/239679.pdf |
genre |
Circus cyaneus |
genre_facet |
Circus cyaneus |
op_source |
Seys , J 1992 , ' Resultaten van slaapplaatstellingen van blauwe kiekendieven Circus cyaneus in de kustpolders en het krekengebied van NO-Vlaanderen in de winters 1990-1991 en 1991-1992 ' Mergus , vol 6 , blz. 229-241 . |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766391044152229888 |