Pollinator insects: bumblebees, bees, wasps (Hymenoptera, Aculeata) and hoverflies (Diptera, Syrphidae) of the Nature Reserve «Kivach» from Russian Karelia were inspected in years 1997–1999 by yellow color-traps. 34 species of Hymenoptera and 35 species of Diptera were found in the study period. New for Kivach were following 38 species. Insects 21.8% of the species were captured for all 3 years, 27.5% – for 2 years and 50.7% – for 1 year. Kivach show a high diversity and strong populations even when scoping on the whole Northern Europe. The species number of bumble-bee was 14 which is a high number. Also the captured number of bumble-bee individuals was quite high. But many species of hoverflies were not numerous. Some observed species are threatened and also include in Red Data Books: of Russia (Bombus schrencki and B. sporadicus), of Karelia (Vespa crabro, Anistrocerus antilope, Temnostoma vespiforme), of East Fennoscandia (A. antilope).