02: Details selected species

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. Ritariperhonen data include both caterpillars and imago's.
Figure 2. Most observations of Ritariperhonen relate to caterpillars.

Figure 3. First observation of Keisarinviita was in 2011. So far, 2016 was the best year, whereas 2017 was dramatic with not a single observation.
Figure 4. Initially, Keisarinviita was observed only along Liesjärvintie, but now everywhere in the area.

Figure 5. Suruvaippa is not seen every year, but when present, it can be numerous.
Figure 6. First individuals are in general observed in the first week of August, but in recent years the species seems to occur also earlier in summer.

Figure 7. Haapaperhonen is not spotted every year. It is often observed on gravel roads.
Figure 8. Haapaperhonen is mainly seen in the beginning of July.