Sorry it's rotated, the thing actually hangs down and has an opening about 1cm wide. It is about 12cm high and hanging on a tree in my garden.

Cheers

Wasp's nest.

Weaver birds nest probably.

Sit and observe from a safe distance. Then let us know.

jb1

Weaver birds nest probably.

Agree with this.

Sophon

It is a Weaver bird nest.

Please don`t disturb it and let nature take it`s course.

I am almost certain that Its a Hornets nest some times they hang, be aware that if you disturb them they will chase you and probably kill you with a lot of stings, you will have to as some one to take it away if you have children that play near it.

Looks a bit small for a hornets nest, but you never know. I googled weaver bird nests and while there seem to be many types none quite looks like my one.

I have no intention of disturbing it.

Been watching it for a while now and no sign of activity.

Birds nest are made from grass or leafs while the more dangerous insects make nest from sand. But as said before keep out, don't investigate

There are smaller hornets that sting but not fatal, but i would definitely observe what flies in and out first before you do any thing ,if its not a problems leave it alone.

OP: just be curious and interested about it.

Needn't disturb unless it is a vital threat......which I doubt.

Had a hornets nest on my property. A local came and paid 200baht for it. Took it away, when he did I stood well clear. He seemed to know what he was doing and didn't get stung. I understand they eat the larvae found inside the nest.

Definately a Weaver Bird's nest. Have many in my garden. Please do not interfere with it. At the end of the nesting season the birds will depart and then you can remove the nest if you want to. Next year, when they return, they will build a new nest!