Figure 2. from: Melampyrum sylvaticum as a pre-diapause host plant of the scarce fritillary (Euphydryas maturna) in Finland - Biodiversity Data Journal 3: e5610 (17 July 2015) https://doi.org/10.3897/BDJ.3.e5610
2018-05-26T13:42:09Z (GMT) by
Figure 2. - Clear-cut edge habitat of Euphydryas maturna. Clear-cut edges typically remain suitable for breeding for some years only until they become overgrown by tall grasses and tree seedlings.