Monitoring summer (nursing) bat colonies in the Miljacka II cave in 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
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