| density, | City/town, country (year, habitat, location) | Source |
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| pairs/10 ha |
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| More than 100 | Legnica, Poland (2003–2004, down-town Central Park) | Tomiałojć 2007 |
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| 50–99 | Słupsk, Poland (1990–1997, urban parks); Legnica, Poland (1966–1967, 1972, down-town Central Park); Wrocław, Poland (1970–1973, Słowacki Park) | Gorski et al. 1998, Tomiałojć 2007, Tomiałojć et al. 2020 |
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| 40–49 | London, Great Britain (1974, St James’s Park); Zielona Góra, Poland (parks) | Tomiałojć 1978, Bocheński et al. 2013 |
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| 30–39 | Legnica, Poland (2006, cemetery) | Jędro et al. 2008 |
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| 20–29 | Słupsk, Poland (1985–1989, urban parks); Legnica, Poland (2004–2005, cemetery); Wrocław, Poland (2009, 2013, Południowy Park; 2007, Botanic Garden) | Gorski et al. 1998, Jędro et al. 2008, Kopij & Zendwalewicz 2009, Kopij 2010, Tomiałojć et al. 2020 |
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| London, Great Britain (1974, Kensington Gardens); Wrocław, | Tomiałojć 1978, Tomiałojć |
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| 10–19 | Poland (2009–2010, Szczytnicki Park; 2008–2010, Słowacki Park; 2013, Botanic Garden); Warsaw, Poland (2015, Krasińskich Gar- | 2011, Luniak & Węgrzynowicz 2019, Tomiałojć et al. 2020, |
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| den); Mezőhegyes, Hungary (2022) | Csathó & Bozó 2022 |
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| 8–9.9 | Słupsk, Poland (1974–1977, 1990–1997, suburban parks); Siedlce, Poland (1999, cemetery at Cmentarna St.) | Gorski et al. 1998, Kasprzykowski & Łuczak 2000 |
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| Lublin, Poland (1988–1990, Akademicki Park; 1989–1991, Botanic |
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| Garden; 1989–1991, area planted with trees in Czechów); Słupsk, | Biadun 1994, Gorski et al. |
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| 6–7.9 | Poland (1985–1989, suburban parks); Liverpool, Great Britain | 1998, Slater 2001, Tomiałojć |
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| (1996–1998, Sefton Park); Legnica, Poland (1965, Peripheral park); | 2007, Mošanský et al. 2014 |
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| Košice, Slovakia (2011–2012, Cemetery of St. Rozália) | |
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| Lublin, Poland (1988–1990, Saski Garden Park); Legnica, Poland | Biadun 1994, Luniak et |
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| (2007, Peripheral park); Wrocław, Poland (2011, Biskupiński Park; | al. 2001, Tomiałojć 2007, |
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| 4–5.9 | 2008, Osobowice Cemetery; 2016, city center); Zielona Góra, Poland (residential area); Warsaw, Poland (2000, Мausoleum of the | Bocheński et al. 2013, Luniak & Węgrzynowicz 2019, |
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| Soviet Soldiers Cemetery, estate near Dąbrowskiego St.; 2004– | Tomiałojć et al. 2020, Csathó |
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| 2005, 2014, Skaryszewski Park); Battonya, Hungary (2022) | & Bozó 2022 |
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| Lublin, Poland (1982–1984, cemetery at Lipowa St.; 1987–1989, |
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| cemetery at Unicka St.; 1987–1990, Bronowicki Park; 1988–1990, | Biadun 1994, Gorski et al. |
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| Majdanek Cemetery, Kalinowszczyzna Cemetery); Słupsk, Poland | 1998, Dombrowski & Łuczak |
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| (1974–1977, urban parks); Siedlce, Poland (1985, Main Siedlce | 1998, Kasprzykowski & |
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| Park; 1984, 1986, Wild Siedlce Park; 1998, cemetery at Cmentarna | Łuczak 2000, Astafieva et |
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| 2–3.9 | St.; 1985–1986, 1998–1999, cemetery at Janowska St.); Kalinin- | al. 2011, Albrycht & Ciach |
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| grad, Russia (2008–2010); Kraków, Poland (2012, Rakowice Cem- | 2013, Mošanský et al. 2014, |
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| etery); Košice, Slovakia (2011–2012, park in Barca); Białystok, | Zbyryt 2014, Kopij 2017, Lu- |
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| Poland (2013, parks); Wrocław, Poland (2017, built-up area); | niak & Węgrzynowicz 2019, |
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| Warsaw, Poland (2006, 2013, Żeromskiego Park; 2013, Krasińskich | Dębowski 2020 |
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| Garden); Końskie, Poland (2016–2017, housing blocks area) | |
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| Lublin, Poland (1982–1984, Ludowy Park); Siedlce, Poland (1984, | Biadun 1994, Dombrowski |
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| 1986, Main Siedlce Park; 1985–1986, cemetery at Cmentarna | & Łuczak 1998, Tomiałojć |
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| St.); Dijon, France (1980–1984, Parc des Sports); Košice, Slova- | 1998, Kasprzykowski & |
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| 1–1.9 | kia (2011–2012, Public Cemetery); Białystok, Poland (2013, city | Łuczak 2000, Mošanský et al. |
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| center, old housing blocks area, small-house area); Warsaw, Poland | 2014, Zbyryt 2014, Luniak & |
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| (2004, 2017, Żeromskiego Park; 2013, Kępa Potocka Park); Oryol, | Węgrzynowicz 2019, Lykov & |
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| Russia (2019, 2021, forest parks, cemeteries) | Sviridov 2024 |
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| less than 1 | Dijon, France (1980, Parc de La Colombiere); Warsaw, Poland (late 1980s, Łazienki Park, Rakowiec, Wierzbno districts; 2006, Kępa Potocka Park); Košice, Slovakia (2011–2012, park on Komenského St.); Wrocław, Poland (2017, industrial area); Białystok, Poland (2013, new housing blocks area, industrial areas, suburban rural habitats); Oryol, Russia (2019, 2021, parks, small-house areas, green residential areas) | Tomiałojć 1998, Luniak et al. 2001, Mošanský et al. 2014, Kopij 2017, Zbyryt 2014, Luniak & Węgrzynowicz 2019, Lykov & Sviridov 2024 |
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