There are more than a dozen swallows hovering back and forth in my yard these days, and I don't know what the omen will be, how good and how bad it will be. I asked my superiors for advice.

Fortunately, swallows are beneficial birds, hovering near your home. That may be because there are many mosquitoes in your house, and swallows can eat your mosquitoes. In a few days, there will be no mosquitoes in your house, and you can have a good sleep. This is really a good thing. As for good or ill luck, if you want to believe it, it's a good thing, not a bad thing.