Brachionycha
Observations/month
| Month | 1983–2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2022 | 2023 | total | |
|---|
| Januar | | | | | | | | | | | | | | | | |
| Februar | | | | | | | | | | | | | | | | |
| Mars | 4 | | | 14 | | 5 | 2 | 2 | 4 | | 2 | 3 | 1 | | 20 % | |
| April | 23 | 13 | 25 | 7 | 4 | 7 | 6 | 13 | 7 | 9 | 11 | 4 | 1 | 4 | 73 % | |
| Mai | | 1 | 1 | 2 | 4 | | | 1 | | 1 | 2 | | | | 7 % | |
| Juni | | | | | | | | | | | | | | | | |
| Juli | | | | | | | | | | | | | | | | |
| August | | | | | | | | | | | | | | | | |
| September | | | | | | | | | | | | | | | | |
| Oktober | | | | | | | | | | | | | | | | |
| November | | | | | | | | | | | | | | | | |
| Desember | | | | | | | | | | | | | | | | |