Returning adults
The last fledgling left my gourds over two weeks ago. Although no "overnight" birds remain, a number of adults have returned to the gourds nearly every day since the last one left. This monring, for example, there were eleven of them. A group will suddenly appear, making noises as they fly around, then swoop down to the gourds or land on the utility wires near the housing. These are all mature adults. There appear to be no fledglings, nor even any second year adults, among them. Most of the birds will look into, and some even enter, the gourds. Their behavior is very similar to that exhibited earlier in the spring when a number of birds seemed to be assessing whether my gourds would be a good place for them to help produce the next generation. Then they all leave, just as suddenly as when they arrived. Does anyone have a theory as to why they return and act as described herein?