The Four-spotted chaser is a species of dragonfly with a widespread distribution across Europe, stretching from Ireland in the west to Russia in the east, and southern Scandinavia down to the Mediterranean. It's also been introduced to New Zealand. Belonging to the family of skimmers, it's characterized by its distinctive markings, featuring four large, dark spots on the wings, which are held vertically when resting. The body is slender and elongated, measuring around 45–55 mm in length, while the wingspan can reach 70–80 mm. This species typically inhabits calm waters, such as lakes, ponds, and canals, with vegetation growing close by. These waters often have a sandy or muddy substrate and are usually well-lit and nutrient-rich. The larvae live in the sediment of these habitats, emerging as adults during late summer and early autumn. Adult four-spotted chasers are most active during this period, feeding on small flying insects. Males and females exhibit different behaviours. Males patrol territories near their breeding grounds, perching on prominent objects like reeds or twigs, while females lay eggs among emergent vegetation. Dragonflies like this have a significant ecological role as indicators of a healthy aquatic ecosystem. They are sensitive to environmental changes and their presence indicates clean and unpolluted water. Furthermore, they contribute to controlling insect populations, including mosquitoes. Currently, the Four-spotted chaser is not considered a threatened species, though local populations may be at risk due to habitat loss and degradation. Efforts to restore and protect wetland habitats are crucial to maintaining this species' longevity. Climate change also poses a future threat, particularly in northern regions, where shifting temperatures could disrupt breeding timelines and impact their overall distribution.
