Unusually large swarm of dragonflies invades California

An unusually large swarm of dragonflies has invaded California, specifically lingering in the San Francisco Bay Area this summer. Entomologists have identified multiple key factors that are driving this high concentration of insects to remain in the region. The phenomenon has drawn significant attention from experts who are analyzing the environmental drivers behind the surge. This unexpected increase in the dragonfly population marks a notable biological event for the local ecosystem within the California coastal region.