Its an ant nest

On our back of our place on one of the post for the boundary fence we got this Ant nest (Termite), we get few of then on our place.

[herecirm]

Oh wow! What an interesting sight! But probably not good news for your fence post...

[Keren]

@herecirm That's why I like to photograph funny thing from Australia, we do have funny thins here. up north in Australia you got ants nest as high as 3-4 meters. as sometime its get flash floods. Here its not so good for houses as they like wood and can eat the frames of houses. not good (* we build out hose from steel....)