Africanized bees are brutal. In the lower states they requeen their hives 2x a year just so they do not get any africanized bee genetics in them. And if they are queen breeders, they are required to get testing done to ensure they are not selling any with africanized genetics
If you plan to work with these bees, i would requeen them with a european (sp) queen.
When people do work with them, they wear two suits and a veil and double gloves since they can be vicious.
That there swarm, if you want it, will be easy to catch. Set a box under it with some frames in the box. You will need to have a frame of food and a frame of eggs and larva taken from one of the other hives...make sure no bees or queen on that frame. Give a good shake to get the bees off. Do not want to go starting a small war.
Then, If you can slightly bend the tree over the box and give it a good wack to dislodge the bees. Or in my husband's case, used a chain saw to cut the tree down....boy could i tell you a story on that one. lol.
This picture upon second glance looks high up. Might be hard to do.
When you've knocked the bees in the box, watch what they do. If they all go back up to the tree, the queen did not get into the box. However if the queen ended up in the box, the bees that fell outside the box will march in like in Noah's Ark. An amazing sight to behold.
You need the frame of feed and eggs to keep the hive there so they will not abscond. Add the eggs in after you get the bees in the box.
This might take a few attempts. Now if this is where the swarm just landed chances are the scout bees have either found a new home for this hive or will soon do. So if you want these bees you need to get to it.
With these africanized bees, keep you smoker handy, you are going to need it
For alot more info on bees, check out Beesource Forums. Alot of good advice there
Just so you all know, we keep bees in our pasture. All our fences have 6000v to keep the bears out
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