Hello, I am Molla Donaldson. We live in coastal North Carolina near the SC border. A pair of bluebirds came to our feeder this spring, and I learned they like mealworms, so I ordered a bag which they ate. They built a nest in a bluebird nest we had put up in our backyard on the marsh several years ago. They nested and raised a brood, but have now both parents and young have disappeared. We cleaned out the nest put up a snake baffle and put up another nest a way away, but I have not seen them since. It is now late June. I came to this forum to try to learn why they have disappeared. We have two cats but they never bother birds.