Lady bugs

I wrote about my purchase of lady bugs a few weeks ago. I bought them because they eat the aphids off rose bushes. There were 2500 bugs in the package. Of course, I don't know how they could have counted 2500 of the little creatures. Anyway, I checked on them every day. I only counted 4 of them the second day. They're all gone now. So I'm now singing "Lady Bug, Lady Bug, fly away home".