Duct cleaning
Likely spoofed caller ID as usual, they use an area code to make it look like they are calling from a business local to you.

They're getting wise to the usual joke comebacks...
I guess they've heard them all.

When I said "I have no ducts, only cats", he quickly came back with asking whether I had "any geese or swans"

Called her in Ottawa. Did not answer. Thanks JJD for the heads up.

They have called me repeatedly. Even after me yelling at them etc. This "do not call list" is a joke.