I would try epoxy. Read the package to be sure you get one that will hold water. I repaired a concrete statue that lives outside with epoxy. It's been a few years and it's still together but water isn't sitting in it.

Ditto

I used silicone on my rubber water tub I now use for water feature in my patio garden. Been a couple of years and was still holding. no idea how a hole got punched in the side of the tub.

Thanks for the suggestions. I appreciate it. I really like this bird bath and would hate to just get rid of it if it can be saved.

I would buy any container that would fit inside of it before I threw it away. I've used JB Weld for patching before. It works and it's water proof. Depending on the size of the hole, you could JB Weld a small patch over the hole. Years ago we patched a stock tank with it and a penny.

Imhappy, would JB Weld work on resin? Yes, I will figure out something to make it work if patching doesn't do it. I thought the birds would be afraid of the plant saucer I put in there temporarily, but I saw them drinking out of it a couple of days ago.

Thank you, Dauglos. That is a concern to me. It's been too cold to do anything about it yet but I will definitely check into the safety of the product.