I believe a hive and a swarm are 2 separate things. The swarm usually has something to do with a displaced queen and the rest of the bees follow here (like the patio branch above). And the hive is,,well,, a hive. Man that's a tough way to go though.. scary.
Yup, true that. That's why I left the one overnight. BUT...a swarm sometimes turns into a hive because they have to settle somewhere for good.
Two I had to rid had become such - one was starting a hive thru a small hole into my attic. My neighbor knocked on my door to tell me he had watched them coming & going. A few months later, another bunch was doing the same thru the foundation & under the floor of a utility room I had added on to the back of my shop. In both instances I shot the spray directly into the holes, and they came streaming out by the hundreds. Finally quit after a 1/2 hr. or so, but I still kept watch for a couple days. I have no idea how many died on the inside, though.
My daughter had a swarm build a hive that went floor to ceiling in a wall between studs in her garage wall. She saw them flying in & out of a small crack next an outside light wall fixture. After they got rid of the bees, it started stinking. So they broke through the sheetrock on the inside & scrapped out all of the hive.
In another incident, my electric company came to see if the wooden pole in my backyard needed to be replaced. To do so, the guy dug down along side it to see if the part below ground was rotten. When he got about a foot down, bees started coming out of the ground by the dozens. He got stung twice.
The pole sat right next to a block wall between my yard & my neighbor's. So the guy from the power co. went over there & found the bees had a huge hive behind some old tires & evidently had somehow tunneled into the ground & under the wall foundation. He left it alone & sent out a bee exterminator the next day. He was there over two hours. First he tried to smoking them out. Then he finally used the death spray.