What the species is and where it came from
The green flash is not a species. It is a transient optical phenomenon—ephemeral, non-biological, unclassifiable in taxonomy—occurring at sunrise or sunset where atmosphere and geometry align.
How it works, in terms someone would actually use
It is sunlight bent by the atmosphere at sunrise or sunset, splitting into colours; only when a mirage lifts and magnifies the green edge does it become visible as a flash.
What it gets right
It gets right the visibility of atmospheric dispersion—showing green light, bent slightly more than red or orange, briefly escaping the Sun’s upper limb as a discrete spot.
What it does not
It does not occur without a mirage. It does not last longer than two seconds. It does not appear without a stable, sharp horizon.
What it changed
It changed how we see the boundary between sky and Sun—not by altering light, but by revealing that refraction is not theoretical, but occasionally naked-eye real.
Who it is for, and who it is not
It is for observers who watch horizons closely: sailors, pilots, coastal walkers, and anyone who treats light as something that moves, bends, and betrays its own composition.
Is it worth your time
Yes—if you are patient, have a clear horizon, and understand that two seconds of green is not magic but optics made visible.
