There is nothing good photography related here but to show evidence I caught the thieves in the very act. Perhaps I will put out a sign that says "for birds only". How were they to know the food was for birds and not them. My husband is going to dig around the base of the seed holder, somehow the elevated snow has helped them to get to the top.
You are assuming a level of intelligence for those squirrels that I am not sure they have. If you think they will be able to read that sign! Terrific capture of them in the act, though