Silver Woodpecker Bar

I bought this bar for my son who is very into birds. It's a hobby he picked up several years ago during the pandemic, and since he's too young to drive, I am often birdwatching with him. As a result, I've gotten ok at identifying birds, but nowhere near his abilities. We actually make a pretty good team, because I'm better at spotting movement, so I can point out where to look and he can tell me what I'm seeing. I don't really know much about this bar other than what you can see in the pictures.