Simulation the potential distribution of and its hosts, and , under climate change in China.

Due to climate change, it is significant to explore the impact of rising temperatures on the distribution of Lajonquiere (Lepidoptera) and its host plants, and , and to simulate their suitable future distribution areas in order to provide a theoretical basis for the monitoring of, and early warning about, and the formulation of effective prevention and control policies. Based on the known distribution areas of, and relevant climate data for, , , and , their suitable habitat in China was predicted using the ENMeval data package in order to adjust the maximum entropy (MaxEnt) model parameters. The results showed that the regularization multiplier was 0.5 when the feature combination was LQHPT, with a MaxEnt model of lowest complexity and excellent prediction accuracy. The main climate variable affecting the geographical distribution of , , and is temperature, specifically including isothermality, temperature seasonality, maximum temperature of warmest month, minimum temperature of warmest month, average temperature of coldest quarter. The potential suitable distribution areas for and were similar under climate change, mainly distributed in southwest China, while was mainly distributed in southeast China. Under different future-climate scenarios, the areas suitable for the three species will increase, except for in the 2070s under Shared Socioeconomic Pathway 5-8.5. With climate change, all three species were found to have a tendency to migrate to higher latitudes and higher altitudes. The centroids of the areas suitable for and will migrate to the northwest and the centroids of the areas suitable for will migrate to the northeast.