Monitoring summer (nursing) bat colonies in the Miljacka II cave in 2024
30/10/2024
In summer 2024, the company Geonatura d.o.o. conducted monitoring of summer bat colonies in the Miljacka II cave, an internationally important underground bat habitat (UNEP/EUROBATS)
Monitoring included field surveys of the caves at the time of forming the nursing colonies in June 2024, and an additional visit in July 2024. The aim of the monitoring was to assess abundance of the bat populations present in the cave and determine the species composition, with an assessment of habitat preservation and recommendations for further activities.
Bat monitoring in the Miljacka II has been ongoing for years. This research is primarily conducted in the summer months, when most species form nursing colonies (consisting of females with young). All field surveys and data analysis are performed according to standard methodologies. Five bat species were recorded in the cave, all of which are included in Annex II of the Habitats Directive, i.e., the List of plant and animal species of significance for the European Union and that require protection: Rhinolophus euryale (Mediterranean horseshoe bat), R. ferrumequinum (greater horseshoe bat), Myotis blythii (lesser mouse-eared bat), M. capaccinii (long-fingered bat) and Miniopterus schreibersii (common bent-wing bat).
Analysis of observations indicated significant variations in bat numbers over the year. However, the existing dataset is inadequate for a more detailed analysis of trends in abundance of the present species and the factors affecting their abundance. Therefore, monitoring the summer bat colonies in the Miljacka II cave will continue.







Monitoring
JOŠ NOVOSTI IZ KATEGORIJE
Winter waterbird census in Krka NP in 2025
The waterfowl count in eight areas along the Krka River was conducted on January 18th and 19th, with observations from land and from a vessel, by ornithologist Ivan Budinski from the Biom association and security and expert service employees of the Krka NP
The first find of a snow bunting in the Krka National Park
We are extremely pleased to announce that the first recorded sighting of a snow bunting (Plectrophenax nivalis) has been recorded in the Krka National Park, increasing the bird population in the Park to as many as 230 species
Investigation and monitoring of the status of white-legged crayfish – Austropotamobius pallipes –in the Krka NP area
The white-legged crayfish has a natural distribution in all the rivers of the Adriatic basin and also in the Lika region. However, due to a series of pressures and threats to freshwater habitats (deterioration of water quality, the regulation of watercourses, invasive species), the white-legged crayfish has been disappearing from many locations where it was once present
Mapping the target species of Dalmatian scilla or amethyst meadow squill
Dalmatian scilla (Chouardia litardierei) is an endemic Illyrian-Balkan species that grows on open, occasionally flooded or wet habitats, mainly meadows, grasslands, and basophilic outcrops.