What is this nest? Pic attached!
Hi all,
Noticed a small mound of soil/sand on the lawn last week, it seems to have a perfect hole in the middle, about the size of a 5 pence piece. Since then I've noticed around 4 or 5 appear either on the lawn or in the beds. I haven't seen any insects entering or exiting though 🤔 just wondering if anyone can identify? Wondering if I need to be cautious around them?
Noticed a small mound of soil/sand on the lawn last week, it seems to have a perfect hole in the middle, about the size of a 5 pence piece. Since then I've noticed around 4 or 5 appear either on the lawn or in the beds. I haven't seen any insects entering or exiting though 🤔 just wondering if anyone can identify? Wondering if I need to be cautious around them?

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This site has pics of holes like you have.
https://www.bumblebee.org/OTHERbees.htm