Yes, mosquitoes are hatching and active in March in Chengdu, China, and reports suggest they may be arriving earlier and in greater numbers than usual. While the typical mosquito season in many parts of China begins later in the spring, health authorities and local media, including Chengdu Daily, have noted a surge in activity as early as March due to a combination of an unusually warm winter and increased rainfall. Experts attribute this early maturation to climate patterns like El Nino, which shorten breeding cycles and allow resilient species like the Aedes and Culex mosquitoes to emerge sooner. Although mosquitoes generally prefer temperatures between 20°C and 35°C, they can thrive earlier in warm indoor environments such as basements or corridors. Because of this early onset, health officials have urged the public to begin prevention efforts in the spring, such as eliminating standing water and using repellents, to mitigate the risk of mosquito-borne illnesses like dengue fever and chikungunya.