Feral colonies are different than a swarm of bees.
A feral bee colony is an established "hive" of bees that has made a home somewhere.
Removing a feral colony can be fairly simple (sometimes...or at least so I have heard, but have never had such luck. At least not yet...Lol...) or it can be a bit tricky depending on several factors, one being the location.
Catching a swarm of bees that has landed to rest somewhere while the scout bees are off scouting for a new place to built their home if often a far simpler call (but not always! Again, location has quite a bit to do with this....).
