The answer to 'why is my mosquito nests' is that you likely have standing water near your home that is providing a breeding ground for mosquitoes. Mosquitoes lay their eggs in stagnant water, and these eggs can hatch into adult mosquitoes in as little as 7-10 days. Common sources of standing water include gutters, birdbaths, kiddie pools, and even small puddles.
If you have noticed an increase in mosquitoes around your home, it's important to inspect your property for any potential breeding sites and eliminate them. This may involve cleaning out gutters, emptying standing water, and treating areas with mosquito larvicide if necessary. Maintaining your yard and keeping it free of debris can also help reduce mosquito populations.