Bees/bumblebees or ?

Behind our house is an old 2 story house that is used for storage. Probably built around 1900. Well last night hubby was n the back porch of it moving something and the wall by along the porch started humming. Yikes. Haven't noticed anything flying around in yard or in garden or flowers. I mow by it every week. Guessing it may be bees. But haven't noticed any. Leaving it alone until it gets cold or we have a problem. Any ideas besides bees. The wall is hollow. Just wood siding on outside and wood on inside.

Either bees or hornets is my guess.....they both sometimes like to build in walls

Whatever they are they are there until cold weather unless they cause a problem.

Maybe carpenter beatles they look just like a bumble bee but they eat a perfect round whole in wood and build a home inside. We had them once at home hard to get rid of.

Not bumblebees, they are ground dwellers.

Mowed around there this morning and didn't see anything flying around.

Observe the wall from a distance to determine what species are involved. If it "looks" like Honeybees ... call a local bee keeper for positive identification & possible removal. They may even pay you for the colony removal. If they're ID'd as "Africanized" Honey Bees ... they may remove them or eradicate them.

If they are not Honeybees ... an exterminator may have to be called in.

Call a local bee-keeper. There are specialists that will come and relocate honey bee colonies, which is what they are most likely if you can hear the buzzing from outside. Honey Bee colonies have become a valuable resource since the recent Colony Collapse Disorder (CCD) has started.

Didn't see anything today..

Curiosity would get the best of me till I gave that wall a good poke and ran just to see what came out.

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