The "marsh" is actually a silted-up old course of the first United States Ship Canal (see previous post), but still, it gives an idea of what the edges of Manhattan used to be like. The mats of reeds typical of most marshes are restricted to only a few spots along the edge of Inwood's marsh, thanks to big boulders placed as riprap around the edges of the water. This is too bad - those grasses do a great deal in other marshes to filter out all sorts of pollution. All too often, fast-food litter and dog sewage from the park's fields wash away unimpeded into the marsh and the river beyond.
Still, the mud flats provide a good enough refuge not only for birds, but also for bird food like perch, crabs, oysters, and smaller fish called mummichogs.
The eagles, by the way, are just starting to fly off the platform and around the park. I spotted one last Friday gliding above the soccer field by Shorakapok rock.