The tide goes out and leaves behind a smell like the inside of something ancient — sulfur, brine, the specific rot of Spartina stalks that have been standing since October, now February, their seed heads softened to nothing by four months of rain. A great blue heron stands at the channel’s edge and waits with the patience of a thing that has no word for patience.
The marsh runs between the highway and the harbor. Eighteen acres, legally protected, though it took a lawsuit. On the far side, a fuel terminal: white tanks, a crane, the orange flare of a processing facility burning off excess. On this side, Spartina alterniflora from the water’s edge to the high-tide line, then Spartina patens above it, then phragmites where human disturbance runs highest — the common reed that moves in after damage like a language replacing an older language.
In the channel, horseshoe crabs have left the remnants of their exoskeletons. Not dead, just molted. The old forms left behind. Each one looks like the thing died here, but each one swam away.
The heron moves. Not fled — repositioned. Fifteen feet, unhurried. It has seen something in the water or seen nothing in the water and is merely adjusting its angle. The marsh doesn’t explain.
Somewhere in the mud below the Spartina roots, in the anaerobic darkness two inches below the surface, sulfate-reducing bacteria are doing the chemical work that produces the smell. They have been doing this work for longer than the concept of work has existed. They will do it after the fuel terminal is decommissioned, after the highway is cracked and seamed with weeds, after the jurisdiction that issued the lawsuit-that-protected-the-marsh is a footnote in a governance history nobody is reading.
A herring gull lands, walks six steps, picks up something, drops it, picks up something else. Its feet are yellow. Its eyes are yellow and ringed with red. It is not looking for anything — it is looking, which is different.
The wind comes off the harbor and the Spartina bends. It doesn’t resist and it doesn’t yield — it bends, which is both at once. By April the new growth will push up through the standing dead. By June the marsh will be so green it looks like something drawn, too saturated, improbable. By October it will go bronze and amber, the seed heads will appear again, and the cycle will not have been a cycle so much as a continuation — the same marsh, same mud, same chemistry, reaching through time in the only way it knows.
The heron strikes. From this distance you can’t tell if it caught anything, but in a moment it swallows or it doesn’t and repositions again either way.
The fuel terminal hums. The highway hums. The marsh makes sounds that are not hum — the click of small crustaceans, the murmur of water moving through grass, the particular silence of mud that is not inert but working.
An egret materializes at the channel’s bend. It is white against the brown of winter marsh and it is not symbolic. It is present in the way that only white things are present against brown ground: simply, completely, with no remainder.