Hole 3

 I did some research on the possibility that the hole was made by a bumble bee.

See my last posts from febr 03  and febr 05
I found on the web, that the Bumble bees are coming out of the ground from their hibernation half of Februari.
These are only the Queen Bumbles, The last year generation of bumbles all died.

Also was mentioned that they are about 10 cm beneath the surface during winter hibernation.
When the the Queen bumbles are coming out they go searching for food and make a nest for the next generation.
I love the idea of having a Queen bumble. I did not know that.
I thought only Bees have a Queen, but the bumbles are family of the bees.
Very interesting. Isn't it? 

All the bumbles you gone see this month are all Queens!