Ants?

Hi All, just found a some holes (pictures attached) in the garden that are a little larger than you average ant hole. They are about 7 to 8mm in diameter. The collar round the hole is quite hard as though its been glued. I poked around in one and there's no activity.

Any ideas please?

Thanks.

 

Mining bees? We used to get a lot of these in our old garden.

 

Well, if they're not mining bee nests they're doing bloody good impressions of 'em AFAIC!

Nick

 

Thanks both, Mining Bee's it is then.