title: First records of invasive Vespa velutina nigrithorax Buysson, 1905 (Hymenoptera: Vespidae) and Megachile sculpturalis Smith, 1853 (Hymenoptera: Megachilidae) in Slovakia
abstract: Abstract Biological invasions are an increasing threat to ecosystems; early identification of invasive species and rigorous monitoring are prerequisites to minimize environmental damage. Currently, two large hymenopterans of Asian origin are spreading across Europe: the yellow-legged hornet Vespa velutina nigrithorax Buysson, 1905 and the giant resin bee Megachile sculpturalis Smith, 1853, populations of which have been gradually being discovered across Europe since 2004 and 2008, respectively. 
journal: Biologia