In past years, we have seen swifts flying down chimneys at dusk about this time of year--it's a magical thing to observe.
This year, we haven't seen them at the locations they visited before; perhaps the owners of the houses closed up their chimneys.
Anyone observed them in Sonoma County this year? Here's a reference, though I'm not enough of a birder to know if this is the correct species: https://en.wikipedia.org/wiki/Chimney_swift
Kevin
