I am an idiot.

Had all these tadpoles in a kiddie pool. Gave them cheerios last night
and enjoyed watching them on their merry-go-rounds, but today i reason
that birds like cheerios too, and hey, if there are fish attached to
those cheerios, i bet they like them even better.

I dont know how many are left but something wiped out over a thousand.

Now, after the fact, there are house screens on top of the pool to
save whatever is left.

Let this be a lesson to some other new toad/pond person!