As a part of the 2nd European Congress on Odonatology (ECOO 2012), which was held in the beginning of July 2012 in Belgrade (Serbia), a post congress excursion to Bosnia and Herzegovina was organized. Between 6 and 12 August 2012, altogether 36 localities in three biogeographical regions throughout Bosnia and Herzegovina were surveyed, and 52 dragonfly species were found. This represents 83% of the hitherto recorded dragonfly species for the country. The most significant results are the second record and a new locality of Somatochlora metallica, second record of Coenagrion hastulatum, and first observation of the strong population of Lindenia tetraphylla for the country. New records of rare and/or threatened species, i.e. Coenagrion ornatum, Ceriagrion tenellum, Caliaeschna microstigma, Cordulegaster heros and Selysiothemis nigra, are also reported. The records of the most interesting species are briefly discussed from the aspects of biogeography and nature conservation.

Karst poljes (or poljes) are specific geological formations of the Dinaric Alps and are important wetland areas of high biodiversity value. The dragonfly fauna of poljes in Bosnia and Herzegovina is poorly researched and mostly unknown. In order to investigate dragonfly species and habitats in these specific and interesting habitats, field research was conducted from April to October 2011 in Livanjsko polje (west Bosnia), the largest periodically flooded karst polje in the world. The number of recorded species indicates high species richness of this area, 41 dragonfly species in total were observed, of which 25 species are new for the research area. Description of habitats and dragonfly communities from 34 surveyed localities is presented. The most interesting are the records of Chalcolestes viridis (Vander Linden, 1825), nationally rare species and NATURA 2000 species Coenagrion ornatum (Selys, 1850). The results of this research significantly contribute not only the knowledge of dragonfly fauna of poljes but also the overall knowledge of dragonfly fauna of Bosnia and

The complex of karstic mountains Prenj-Cvrsnica and Cabulja in Herzegovina (w. Balkan) is characterized by high level of both geomorphology and biodiversity richness. This has been confirmed by a research of plant communities, their structure and dynamics, which took place throughout several seasons from 2005 to 2008. In the investigated area the vegetation cover, as a reliable indicator for specific karstic circumstances, is being differentiated in a great number of syntaxa (plant communities) that encompass over 2,500 vascular plants. On the surface of about 100,000 ha identified were up to 236 plant associations, 116 alliances and 63 vegetation orders that belong to 34 classes. This amounts 34% of total of vegetation classes at the European level and 100% of so far known vegetation classes in Bosnia and Herzegovina, over 80% of classes at the level of Montenegro and Croatia.There have been identified nearly 450 endemic and relict species, which is why most of the identified communities are endemic and relict ones, not only at the level of association but also at the level of higher syntaxonomic categories, such as alliance and order. The highest diversity level characterizes those communities that make a direct contact with the calcareous geological foundation either in rock crevices or screes on limestone. That high level of floristic and vegetation richness places this area among the most diverse areas both in Europe and whole Mediterranean.That high level of floristic and vegetation richness places this area among the most diverse areas both in Europe and whole Mediterranean. Such pattern of vegetation (syntaxonomy) and floristic diversity confirms the unique role of dinaric-herzegovina karst as a complex of unrepeatable ecological factors on global scale.

The entomological collection of the National Museum of Bosnia and Herzegovina is one of the oldest Balkan insect collections. Eighty-seven (87) dragonfly specimens from 19 species that originate from Bulgaria were found in this collection. In this paper we present the oldest and till now unknown records of dragonflies from Bulgaria from this collection. Some interesting and new distribution data on several species are also presented and discussed.

The harlequin ladybird Harmonia axyridis (Pallas, 1773) is an invasive species native to east and central Asia (BROWN et al., 2008). It was deliberately introduced as a biological control agent of aphids and coccids in Europe, North America, South America and Africa (KOCH et al., 2006). The first known record of this species in natural environments in Europe is from France in 1991. BROWN et al. (2008) reported that H. axyridis is established in France, Germany, Belgium, the Netherlands, Spain, Switzerland, Luxembourg, the United Kingdom, Italy, the Czech Republic, Austria, Denmark and Liechtenstein. The presence of H. axyridis in the wild is also reported from Poland (PRZEVOŹNY et al., 2007), Hungary (MERKL, 2008), Serbia (THALJI & STOJANOVIĆ, 2008), Romania, Slovakia and Ukraine (MARKÓ & POZSGAI, 2009).