Yeah, the birds are pretty good at that. When the sky starts to look gray, the geese and swallows drop to lower altitudes, almost like they’re feeling the pressure shift. If the flocks tighten up or start zig‑zagging instead of a steady V‑shape, that’s usually a warning sign. The wind will often start gusting off the wrong direction, too. Just keep an eye on the air and the birds—nature doesn’t forget her pattern.