When you’re mesmerized by sonar blips and split-screen Fathometers, it’s easy to overlook the most obvious signs of a bite in this high-tech world — namely, the seabirds circling, dipping and diving in the distance. But whether you’re fishing off Cabo San Lucas, Mexico, Cape May, New Jersey, or Ocean City, Maryland, seabirds can mean the difference between a multimillion-dollar payday and going home busted.
Gannets, terns and other seabirds are unique because they can see parts of the UV-light spectrum that humans can’t, says oceanographer Mitch Roffer, a birder specializing in seabirds. It’s as if they have polarized vision. “Depending on the species, marine birds have either red or yellow oil droplets within their eyes’ color receptors that improve their distance vision — especially in low-light conditions, like haze…