Objective To investigate the distribution and monthly changing trend of tick species in the main habitats in Yiwu city of Zhejiang province in China, and to provide a scientific basis for formulating targeted tick control regimens. Methods Three representative habitats were selected, i.e., sparse-forest and dense-grass woodland, farm fields, and dense-forest and sparse-grass woodland, and an investigation of on-host ticks was performed for the goats stocked in these habitats in the middle ten days of each month from March to November in 2021. The t test and variance analysis were used to compare the count data, the Chi-square test was used to compare the rate and the composition ratio, and the Pearson correlation analysis was used to analyze the relationship between the tick index and the positive rate of host animals. Results A total of 269 goats were investigated, among which 198 were infected with ticks, with an infection rate of 73.61%, and 2 033 ticks were obtained, with a tick index of 7.56. Species identification showed 6 species of ticks in 3 genera and 1 family, among which Haemaphysalis longicornis accounted for 58.48%, followed by Rhipicephalus haemaphysaloides accounting for 28.73%. There were significant differences in the distribution of tick genera among the three different habitats (χ2=582.371, P<0.001), with Haemaphysalis as the main genus in the two types of woodland environment and Rhipicephalus as the main genus in farm fields. The larval, nymphal, and adult ticks were all collected, among which nymphal ticks accounted for the highest proportion. The density of H. longicornis showed a peak in March and a second peak in October, while the density of R. haemaphysaloides only showed a peak in May. Conclusion There is a relatively high density of ticks in Yiwu, with different tick species in different habitats, and thus control work should be carried out according to tick's biological characteristics.
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