When you first think about a fly buzzing around your home, you may dismiss it as an annoyance or you may pause to consider the dangers associated with flies. House flies do in fact spread disease, bacteria and create unsanitary conditions. But there are many different species of flies that can be found in home and cluster flies are one. They are characterized by their distinct stripes behind the head and golden hairs on the thorax. If you can’t tell which type of fly you are seeing by how it looks, you can probably tell by their behavior. Cluster flies are very slow moving and often appear confused compared to the quick movements of the common house fly.