I don’t think you’ll find bedbugs in the great outdoors; I never have, anyway. Now ticks and chiggers are outdoorsy critters. But bedbugs are like liberals, preferring to mooch in an more populated setting.
They typically get passed by humans in luggage, transported bedroom to bedroom, hotel to home and home to hotel, college dorm to apartment, etc.
Yeah, that’s my experience. Fleas from wild animals also. But the thing about bats maybe being a possible carrier is interesting. I wonder if the nymphs cling to bat fur or something.
Freegards
I’m getting that picture, at least that an outdoors source is implausible without having become infested through a more people-linked route. Which still could happen.
I.e., if a place has rats, mice, other critters that nest, those could serve as secondary sources for the bugs. I don’t know why larger livestock couldn’t be infested that way too, though horses with bedbugs would probably be pretty obvious.
I am now doubting that the stove alone is more than a minor factor. Might be encouraging them to find other places to nest in the home, if they still go roaming around after carbon dioxide.
Luring them into a room and bombing them there (or super spraying it) still sounds like a possibility.