Pigeons

It's very quiet here during the week. Mostly I hear my computer humming, an occasional chainsaw, the hourly airplane. Sometimes I can hear bits of my mom's TV or her voice if she's on the phone. But this week it's been these enormous thrums of pigeons taking off from the trees. It's a quiet whoosh at first, followed by a sound I can only describe as motion or maybe pressure. I have a vague memory of my dad really liking or noting or observing the band-tailed pigeons when I was a kid, but now I can't remember what it was he was saying about them. There were more than he remembered or less?