Bee enthusiast Rick Graham, who removed the bees, said swarms were not uncommon at this time of year.
He said during spring, nature expands - bees run out of room in the hives - meaning swarms can form.
He said the swarm could be removed from a tree by surrounding the branch they landed on and then either shaking or clipping the branch to get the bees in the box.
The box then has to be left in the same spot to ensure any bees off flying at the time, make it back.
"As long as you've got the queen in the box you seem to be OK," Graham said.
He said the best thing to do if you see a bee swarm in Hawke's Bay is to leave it alone and call Arataki Honey, who could pass the details on to a bee keeper in the area to come and sort it out.
He said there was a world shortage of bees, so it would be a shame if they were killed by a pest eradication company.