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Fig. 1.

Map of Poland illustrating the sampling places. White square: bird migration research station at Bukowo. White dots: localization of sampled black-headed gull colonies.
Map of Poland illustrating the sampling places. White square: bird migration research station at Bukowo. White dots: localization of sampled black-headed gull colonies.

The number and age of individuals from the songbird species sampled in 2016.

Bird Species na April 2016 nb October 2016 nc
Age Age
im. ad. L im. ad. L
Turdus merula   37     6     1     0     0     7   18   11     1     0   30
Erithacus rubecula 210   94   13     0     1 108   79   23     0     0 102
Sylvia atricapilla   11     7     3     0     0   10     1     0     0     0     1
Emberiza schoeniclus     1     1     0     0     0     1     0     0     0     0     0
Fringilla coelebs     1     1     0     0     0     1     0     0     0     0     0
Cyanistes caeruleus     7     6     0     0     0     6     1     0     0     0     1
Parus major     3     2     0     0     0     2     0     1     0     0     1
Phoenicurus phoenicurus     1     1     0     0     0     1     0     0     0     0     0
Parus spp.     1     0     0     1     0     1     0     0     0     0     0
Emberiza citrinella     2     0     2     0     0     2     0     0     0     0     0
Dendrocopos major     2     1     1     0     0     2     0     0     0     0     0
Phylloscopus trochilus     6     0     0     1     0     1     3     2     0     0     5
Turdus philomelos     3     2     1     0     0     3     0     0     0     0     0
Total 285 121   21     2     1 145 102   37     1     0 140

The number of black-headed gulls (adult birds and nestlings) sampled in 2017 and 2018.

Colony X Coordinate Y Coordinate No. BP No. BS 2017 No. BS 2018 Total
Koronowo 53.3341667 17.965 657 53 70 123
Bydgoszcz – Stary Port 53.1211111 18.09361111 185 16 16
Bydgoszcz – Przemysłowa 53.1186111 18.10527778 170 50 46 96
Skoki Duże 52.6063889 19.78916667 4500–5500 70 70
Jankowo 52.7827778 18.08416667 451 68 57 125
Kościeszki 52.5733333 18.33111111 354 56 56
Borów 52.1202778 19.56 100 21 21
Jeziorsko 51.7372222 18.64916667 100 15 15
Przykona 52.0055556 18.65777778 3000 33 33
Wola Rogozińska 51.9713889 19.455 3000 18 18
Zlaków Kościelny 52.1969444 19.78916667 300 16 16
Jezioro Ryńskie 53.9194444 21.50861111 1900–2500 30 30
Sętal 53.9036111 20.48222222 425–450 30 30
Jezioro Nielbark 53.3613889 19.52777778 3000 30 30
Zbiornik Poraj 50.6411111 19.2313888 1060 22 22
Łężczok 50.1436111 18.2797222 360 21 21
Stawy Zawadka 49.9644444 19.1163888 460 19 19
Total 187 554 741
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Inglese
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Argomenti della rivista:
Life Sciences, Microbiology and Virology