Pigeons and Panels...
Nothing good seems to come from this combo, and nesting under panels is considered "the hood," even for Pigeons! Here's a couple of bad eggs that another installer found the other day!
To be fair though, in my twelve years in the industry I've only seen this a handful of times. Inger, with her 10 years of consulting, had only seen it twice.
If birds are an issue around your home, there are products that can be added to the system which prevent them getting under the panels. If you have any current issues along these lines, please get in contact and we can point you in the right direction.