Holes within my courtyard - how can I find out what they are and acquire rid of them? I've got a few holes i've found in my courtyard... and i'm...

I've got a few holes i've found in my courtyard... and i'm not certain but 1 of them look like a snake hole to me... I live contained by Missouri and i'm new to the area so I really don't know... how can I find out what they are and get hold of rid of what ever is in there? I've get a 2 yr old and a 4 yr old and I don't want them getting bitten by anything if they desire to poke a stick in it... any help would be great thank you
Is nearby a phantasm within my house?
Answers:    verbalize to your neighbors ... they will probably know and you can make some new friends.