Abstract: The butterfly species in Ziwuling National Nature Reserve of Shaanxi Province were studied based on samples collected in four typical Habitats:coniferous forest,broad-leaf forest,shrubbery and grassland.A total of 832 butterflies belonging to 6 families and 45 species were captured,of which the largest number of species and individual was Nymphalidae.In 4 habitats,the highest number of butterfly species was in broad-leaf forest,of which Nymphalidae was dominant family,while the least was in the grassland,of which Hesperiidae was dominant,it was moderate in coniferous forest and shrubbery,among which the dominant family was Pieridae in the former,but a dominant family was not obvious in the latter.The butterfly species diversity,richness,evenness and dominance index within the four kinds of habitats were calculated and analyzed.The results indicated that the habitat diversity,evenness and richness were highest in the broad leaved forest,and the dominance was the lowest,while the grassland habitat was the opposite,coniferous forest and shrubbery were in the middle.Except in the grassland habitats,the butterfly species abundance curves in the 3 habitats conformed to the lognormal distribution.

Key words: butterfly, diversity, community structure, Ziwuling Nature Reserve