Observations of Ritariperhonen, Keisarinviita, Suruvaippa, Haapaperhonen. These species were monitored quantitatively
per day. The graphs show total observations by year (panels at the left) and their occurrence during the season (panels at the right).
Figure 1. Most Ritariperhonen observations were caterpillers. Adults are only rarely observed.
Figure 2. The species is observed most often at
the end of July.
Figure 3. Keisarinviitta was observed only since 2011. In 2017 it was absent for one year.
Figure 4. The species is observed during July.
Figure 5. Suruvaippa is observed irregular,
probably because of the timing of my holidays.
Figure 6. We observe suruvaippa at the end of
July and beginning of August.
Figure 7. Generally, only a few individuals are observed during summer, and not in all years.