A flash of red.
It’s impossible for one’s peripheral vision not be attracted by the Cardinal, a bird of such exotic color that you simply cannot miss him.
The Cornell Lab of Ornithology hosts a definitive bird site which shows the Northern Cardinal mostly inhabits the eastern half of the United States but with some migrating as far west as south eastern Arizona, and thank goodness for that.
Panny GX7, 200mm Nikkor with MFT adapter.