- Tytuł:
-
Gromadne noclegowiska błotniaków stawowych Circus aeruginosus w krajobrazie rolniczym na Wysoczyźnie Ciechanowskiej
Communal roosting of western marsh-harriers Circus aeruginosus in the agricultural landscape of the Ciechanów Upland - Autorzy:
- Murawski, M.
- Powiązania:
- https://bibliotekanauki.pl/articles/2090097.pdf
- Data publikacji:
- 2021
- Wydawca:
- Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
- Tematy:
-
Ciechanów county
Przasnysz county
age structure
sex structure
North Mazovian Lowland
Montagu’s Harrier Circus pygargus
Pallid Harrier Circus macrourus
mixed- species roosting - Opis:
- On 22 August 2020 field observations were carried out in the agricultural landscape of the Ciechanów and Przasnysz counties. A roost of 36 individuals of the Western Marsh-harrier Circus aeruginosus was found near Golany (Przasnysz municipality, Przasnysz county) in a sugar beet field Beta vulgaris subsp. vulgaris overgrown with the common lambsquarters Chenopodium album. Next controls documented the increase in the number of harriers and on 5th September there was a group of 62-65 birds. Several Montagu’s harriers C. pygargus and an adult male of the Pallid Harrier C. macrourus were also recorded at that roosting site. The latter stayed in the area for about 3 weeks and used two roosting sites alternatively. Another roosting site was also found nearby. There were12 western marsh-harriers, 1-2 Montagu’s harriers, and the aforementioned male Pallid Harrier. On 12 September the large roost near Golany disappeared due to a beet harvest and ploughing the field. The increase in the breeding population of the Western Marsh-harrier in Poland caused by inter alia development of field populations of this species, results in the increasing number of the records of communal roosting in the agricultural landscape. Therefore, efforts should be made to develop counting methods on such roosting sites and to protect the largest regional roosts of the Western Marsh-harrier and Montagu’s Harrier.
- Źródło:
-
Kulon; 2021, 26; 43-48
1427-3098 - Pojawia się w:
- Kulon
- Dostawca treści:
- Biblioteka Nauki
Artykuł