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| Species | Phenological stage | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Common Swift | Birds are singing | 10.06 | 21.05 | 19.05 | 21.05 | 20.05 | 25.05 | 29.05 | 26.05 | 20.05 | |||||||||||
| Common Swift | Arrival | 16.05 | 07.05 | 25.04 | 09.05 | 13.05 | 20.05 | 10.05 | 25.03 | 12.05 | 24.04 | 29.05 | 21.05 | 13.05 | 16.05 | 20.05 | 16.05 | 20.05 | 17.05 | 17.05 | 18.05 |