Animal world

Inhabitants of Lokrum – Free and Unique

FAUNA

Bats

Bats and their colonies are protected by national and EU legislation. Lokrum Island represents an ideal habitat for a large number of bats dure to its rich forest habitats, three open water areas, numerous natural and artificial shelters (buildings), as well as the asence of artificial lighting, noise and human activity during the night. For most bat species, Lokrum functions as an oasis in Croatia, a country otherwise characterized by urbanization, heavy traffic, artificial lighting at night and anthropogenic noise. A total of 12 out of the 34 bat species recorded in Croatia were documented on Lokrum, representing exceptionally high diversity of bat species for an island of only 0.7 km².

Studies have confirmed the presence of maternity colonies of the Balkan long-eared bat (Plecotus kolombatovici), the lesser horseshoe bat (Rhinolophus hipposideros), the greater horseshoe bat (R. ferrumequinum), the whiskered bat (Myotis mystacinus/aurascens), the Natterer's bat (Myotis nattereri), within the Benedictine monastery complex. In addition to these species, several others have been recorded on the island including Savi's pipistrelle (Hypsugo savii), Schreiber’s bent-wing bat (Miniopterus schreibersii) greater noctule bat (Nyctalus lasiopterus), the common noctule (N. noctula), Leisler's bat (N. leisleri), the Kuhl's pipistrelle (Pipistrellus kuhlii) and the Nathusius's pipistrelle (P. nathusii). Furthermore, the presence of the greater mouse-eared bat (Myotis myotis) and the European free-tailed bat (Tadarida teniotis) has so far been detected exclusively through acoustic monitoring, and therefore requires additional confirmation through field observations.

Photo: Boris Krstinić

Birds

On Lokrum Island, 52 species of birds have been recorded, of which 12 are resident nesting birds: the Eurasian sparrowhawk (Accipiter nisus), the Eurasian eagle-owl (Bubo bubo), the European greenfinch (Chloris chloris), the rock dove (Columba livia), the hooded crow (Corvus cornix), the chaffinch (Fringilla coelebs), the Eurasian wryneck (Jynx torquilla), the white wagtail (Motacilla alba), an allochthonous species – the common peafowl (Pavo cristatus), the Eurasian blackcap (Sylvia atricapilla), the Sardinian warbler (Sylvia melanocephala) and the Eurasian blackbird (Turdus merula). Of migratory nesting birds, species such as the common swift (Apus apus), the pallid swift (Apus pallidus), the barn swallow (Hirundo rustica), the nightingale (Luscinia megarhynchos) and the Eurasian scops owl (Otus scops) have been recorded. Wintering birds have also been recorded, such as the northern goshawk (Accipiter gentilis), the common buzzard (Buteo buteo), the European robin (Erithacus rubecula), and others, as well as passage migrants – the squacco heron (Ardeola ralloides), the European snake-eagle (Circaetus gallicus), the common cuckoo (Cuculus canorus) and others, in addition to two migration birds – the European honey buzzard (Pernis apivorus) and the western rock nuthatch (Sitta neumayer).

Scops Owl

To date, 52 bird species have been recorded on Lokrum, some of which nest regularly on the island, while others are migratory, wintering, or passing species.  Among the permanent nesting birds are species such as the Eurasian eagle-owl, chaffinch, blackbird, and hooded crow, while among the migratory nesters, particularly notable are the Eurasian scops owl, barn swallow, and common swift.  Recorded wintering species include the goshawk, common buzzard, and European robin, while Lokrum is also important for passing birds, with rare species such as the squacco heron and short-toed snake eagle being observed.  The most important nesting areas are located in the Vela and Mala caves on the southern part of the island, home to species such as the common swift and Eurasian eagle-owl, as well as on the rocky slopes of northwestern Lokrum.

Photo: Boris Krstinić

Amphibians and Reptiles

Harmless snakes are present on Lokrum: the slender whip snake (Platyceps najadum) and the Balkan whip snake (Hierophis gemonensis), which are, however, very rarely seen. There are also species such as Hermann's tortoise (Testudo hermanni), the Balkan green lizard (Lacerta trilineata) and the Mediterranean house gecko (Hemidactylus turcicus).

Peacocks

Today, Lokrum Island is home to a population of Indian peafowl (Pavo cristatus), introduced in the mid-19th century, most likely during the stay of Archduke Maximilian of Habsburg. Since then, they have become a visible and recognizable part of the island’s visual identity, often attracting the attention of visitors. Although they are attractive and unusual inhabitants of the island, peafowl are an allochthonous species — one not naturally found in Mediterranean ecosystems. Their presence on the island is therefore also viewed in the context of preserving biodiversity and managing natural values. Due to their long history on Lokrum, they are considered an accepted part of the landscape, but with continuous monitoring of their impact and the need to align with the nature protection objectives of this protected area.

ENTOMOFAUNA

Butterflies

On Lokrum Island, 212 species of diurnal and nocturnal butterflies have been recorded, of which 18 belong to diurnal butterflies. All recorded species are typical of the southern Adriatic islands. Forested Lokrum is most suitable for forest species and forest edge species such as the speckled wood (lugara (Pararge aegeria), the eastern rock grayling (Hipparchia syriaca) and the southern white admiral (Limenitis reducta). These three species are very common and widespread on the island. In the coastal areas we also find the two-tailed pasha (Charaxes jasius), one of our largest and most colourful diurnal butterflies. Of the Mediterranean species, the island is inhabited by the Cleopatra (Gonepteryx cleopatra), the pea blue (Lampides boeticus) and the mountain small white (Pieris ergane). We can also meet the occasional common yellow swallowtail (Papilio machaon), the clouded yellow (Colias croceus), the red admiral (Vanessa atalanta) and the painted lady (Vanessa cardui). The presence of the purple hairstreak (Favonius quercus) is significant, given that there are only a few recent finds of this species in the Dubrovnik-Neretva County.

Beetles (Coleoptera and Orthoptera)

On Lokrum Island, 72 species of beetles have been recorded, most of which are ladybugs (Coccinellidae), leaf beetles (Chrysomelidae) and long-horned beetles (Cerambycidae). Of the Orthoptera on Lokrum, a total of 16 species have been found so far, of which just 7 live only outside the forests, while for four of the species this is the first time they were recorded in the area of the City of Dubrovnik. Four species of grasshoppers are also found (Acrotylus patruelis, Oedipoda caerulescens, Pezotettix giornae and Chorthippus bornhalmi) (Tvrtković 2016).

Photo: Boris Krstinić