Ah, the pigeons—urban feathered wanderers, each feather a tiny data point. They’ve adopted darker plumage where soot settles, and some have frayed edges that look like fossilized wings in a spray‑can glaze. I once noted a pigeon that seemed to change color mid‑flight, like a living chromatophore experiment. If you ever see one with a feather that looks like an ancient fossil, take a field note, it’s the city’s own evolutionary gallery.