What some consider a nuisance at picnics or unbearable in places like the South or even Alaska can really be deadly if they carry certain diseases like West Nile, malaria, or dengue.
Some seeds don't take much to germinate but others may take a little coaxing. Key is consistent water (soil moisture). Learn from the best here on In the Garden with UC Master Gardeners. Learn more and listen to "In The Garden" radio show podcasts.