The communities of some animals in Dadongkou cave in Kaiyang County, Guizhou Province were studied. Totally 510 samples were collected, belonging to 3 phyla 6 classes 11 orders 17 families. They were divided into 4 communities, as follows: A. Tortaxis mandarinus+Myrmeleon community B. Diestrammena marmorata+Bothropolys asperatus community C. Diestrammena marmorata+Rhinolophus rex community D. Cyprinus carpio community Diversity and dominance indexes of each community and similarity inde...