Abstract
The study aimed to determine the species composition of beetles and their distribution in 3 habitats in Dong Son - Ky Thuong Nature Reserve, Quang Ninh. Direct investigation method of beetles at 3 habitats have been used. The results showed that there were 59 species of beetles belonging to 49 varieties and 18 families. The Scarabaeidae family and the Cerambycidae family with 12 species have the largest number of species. The Eulichadidae, Passalidae, Languriidae, Dytiscidae, Hydrophilidae, Lampyridae, Cleridae and Carabidae families have the lowest number of species with 1 species each. The primary forest habitat has the highest number of species with 35 species, accounting for 59.32% of the total species. The shrub grassland habitat has the least species with only 14 species, accounting for 23.73%. The number of species samples of beetles collected with light traps at night was11 species higher than that collected with racquets during the day.
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