It was a slightly cloudy day in mid-May when I decided to visit the northern part of Istria (Croatia), between Mount Ucka (Fig. 1) and the mountainous plateau of Cicaria, which is an extension of the Dinaric Alps. The area is mostly uninhabited, wild and largely untouched. Flower-rich wheat meadows are dominant here; in the past they were (most probably) pastures. Today they provide habitats for bees, butterflies, grasshoppers, spiders, mammals, reptilians and so on. Among flowers, I recognized Polygala nicaensis, members of the genera Ajuga and Ranunculus, various orchid species and, of course, grasses. Among orchids, I found Orchis puprpurea (Fig. 1 and 2), Orchis tridentata (Fig. 3), the very common and widespread Orchis morio, the delicate Cephalanthera longifolia and the non-photosynthetic Neottia nidus-avis, which prefers shady places along the nearby deciduous woodland.
Given the altitude and the higher soil moisture level, the plant communities present here are the typical sub-mediterranean ones. Therefore, I had the pleasure to meet some butterfly species for the first time, one of those meriting a special attention: Everes alcetas (Fig. 4) or the Provencal short-tailed blue. It is a member of the Lycaenidae family which, although occuring sporadically, it is common across the central Europe.
In general, they feed on plants of the genus Medicago, Coronilla varia and Galega officinalis where they lay their eggs. They prefer bushy and sunny places but in Istria are very local and spotted by me only in this location.
One butterfly species that I encountered in the same area is the marsh fritillary (Euphydryas aurinia), a member of the Nymphalidae family (FIg. 5 and 6). This species is in decline in Europe, and is protected under law in the United Kingdom. However I managed to see them quite abundantly in many sites around Istria; perhaps because their habitat – the damp heathy grasslands – is still pretty intact in this region.
This is a widespread species, present in the central and southern Europe. However, it is very local and in Istria I found it only here. Larvae feed on members of the Aristolochia genus and in some areas, for instance in Hungary, it is restricted to only one Aristolochia species: the Birthwort (Aristolochia clematitis). The wings are yellow, a bit paler in females, covered with a gaudy pattern of several black bands and spots, with a distinctive black sinuous line at the margin. On the edge of the hindwings there are several blue and red warning spots. The body is black, with red warning spots at the side.
Photos by Ingrid Ugussi Vukman