Honey bees are rather large and fat looking, which is why they are also known as bumble bees. They bumble around looking for food in flowers. If they are smaller, and have black as part of their color, they could be aggressive. I would leave them alone, and get a professional out there who will move them for you. I know the guy who does this in my area. Smokes them to calm them, then finds the queen. Moving the queen makes the others follow, but do NOT attempt this yourself. The hive has to be moved, if they have built one.
Once the bees are removed, or killed as a last resort, plug up where they got in so others don't use it.
Have you noticed if they are hanging around one place, or are they just feeding off blooming flowers. If they are just feeding, they will leave when they are done. But I agree with Lark. Find a bee keeper in your area and see if he will move them. If nothing else, he will have info on who to contact to help you.
Call a local bee keeper or you could try to build a hive for them. Unless you attack the hive, bees are rather harmless [it's wasps and hornets that sting more than bees] if they are in the swarm they are rather docile, they just want to find a new home, so please, find a bee keeper in your area, do not call the exterminator, bees are dying in record numbers [and not to sound like a crazy bee lady, we need them] so explain to your grandfather you need to call a bee keeper to remove the bees and relocate them.
I no longer am staying with my grandparents at the moment, but they are honey bees and people are either wanting to charge my grandparents $300 to take the bees or aren't calling back. I've googled some stuff and so has my grandad. The bees already have a hive: the house. They've built their hive in the outer walls on the house. There are too many bees and nobody can go in the backyard because of it. My grandad wanted to find a way to kill them since no one could take them without asking for a lot of money, but I don't believe that's right. There are local bee keepers and honey factories to my grandparents, so I'm just hoping the bees go somewhere safe.
If the "bees" have no fuzz but instead look shiny, they are wasps, which are bee killers. I personally have no qualms killing wasps because they mutilated the quiet little honey bee hive on my property two years ago.
Thanks, White. Your info is great!
And Brysing, no, I don't know much about bees, other than the Africanized ones came to Arizona years ago. I got thanked for reporting them. They even killed a horse out here! And going into water doesn't help. They will wait. lol
MaidenCrow, I would leave it to the pros to fix your problem, unless you want to get stung. If they already have a hive, it needs moved or destroyed; moved being preferable.