Wasp and hornet activity is a recurring issue across Glasgow, particularly during late spring and summer when colonies expand rapidly. As temperatures rise, queens begin building nests in sheltered locations such as lofts, wall cavities, rooflines, sheds, and garages. Glasgow’s mix of older properties, modern housing, and shared buildings provides countless nesting opportunities, especially in areas with limited roof maintenance or external wear. Urban environments create ideal conditions for wasps and hornets. Food waste, outdoor eating areas, bins, and nearby greenery all attract foraging insects. In neighbourhoods with gardens, parks, or restaurant activity, nests can become established close to where people live and work. Hornets, while less common than wasps, are larger and more defensive, which increases the perceived risk when they nest near occupied buildings. Wasps and hornets are territorial once a nest is established. Disturbance caused by routine maintenance, gardening, or construction can trigger aggressive behaviour. This is particularly problematic in communal buildings, schools, or commercial premises where multiple people may unknowingly enter high risk areas. Stings can cause pain, swelling, and in some cases serious allergic reactions, making prompt identification and control essential. One of the challenges in Glasgow properties is that nests often go unnoticed until activity becomes intense. Nests inside cavity walls or roof spaces can grow significantly before visible signs appear. Regular buzzing, increased insect presence near windows or vents, and unusual insect traffic around rooflines often indicate a developing nest. Understanding how seasonal patterns affect wasp and hornet behaviour helps property owners recognise risks early and avoid escalation.