The behavior of the marine dragonfly, Erythrodiplax berenice (Seaside Dragonlet), was studied over two summers at Weskeag Marsh, South Thomaston, ME. These dragonflies are lethargic, spending over 99% of their time perched on the culm of a salt marsh plant. No evidence of territorial behavior was found. Females oviposit while in tandem in algal mats on the surface of salt-water pannes. These dragonflies perch preferentially into the wind, presumably to aid in providing lift on take-off.