I passed near a house yesterday and got startled by a siren/moan/scream

Berkeley has feral ones, which can be really startling. Saw a couple of wild turkeys here in Silicon Valley a week or so ago, which threw me. Too urbanized usually. Now wild turkeys I try to avoid from experience. They like to roost in low hanging branches of trees -- yes, the wild version of turkey can get airborne, but only for short distances -- and if you make a mistake of parking under one you will never bad mouth a pigeon again.