【Abstract】 Objective To investigate species composition and ecological habits of rodents from China-Russia frontiers of Heilongjiang province. Methods The live traps and snap traps were used in this study. Results A total of 3461 rodents were caught in five cities of China-Russia frontiers, belonging to 3 families 8 genera 11 species. The dominant specie was Apodemus agraius (58.3%). Mus musculus was the dominant species in the indoor, accounting for 75.9%, and Ap.agraius in the field (43.4%). The species composition of rodent varied with habitats, places and months. During active seasons, there were 2 peaks for rodents in the shrubberies and broadleaf woods, 2 peaks for Ap.agraius and Ap.speciosus in the field, and only one peak for M.musculus and Rattus norvegicus in the residential areas. Conclusion The investigation provided the evidence for the further study on ecology and control of rodents at China-Russia frontier of Heilongjiang province.

Objective To study faunal distribution of blood-sucking horseflies in three province of northeast China. Methods Using animal-baited trap and insect net to collect horseflies, and collecting literatures about distribution of horseflies in three province of northeast China. Results There were 91 species belonging to 7 genera of blood-sucking horseflies known in three province of northeast China, of which 74 species are known in 39 counties and cities in Liaoning, 68 species were known in 26 counties and cities in Jilin province, 61 species were known in 28 counties and cities in Heilongjiang province. 86 species were recorded distributing in North-eastern Zoogeographic Region, of which 79 species were recorded in Changbaishan subterritory, 53 species in Songliao-plains subterritory, 52 species in Daxinganling subterritoy; 39 species are recorded in Eastern-grasslands subterritoy of Mongolia-xinjiang Zoogeographic Region. Conclusion This study provided the basis for faunal distribution of blood-sucking horseflies in three provinces of northeast China.