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What’s With Calvert’s Swamp?

Chesapeake Curiosities: Battle Creek Cypress Swamp is the northernmost of its kind

A habitat unique in Maryland flourishes just south of Prince Frederick. Battle Creek Cypress Swamp is one of the nation’s northernmost naturally occurring stands of bald cypress trees.
    “It’s actually a bit of a mystery why the swamp is here, as we don’t see similar stands of trees in other low-lying swampy areas of the county,” says Shannon Steele, Calvert County naturalist.
    In 1957, the Nature Conservancy purchased 100 acres of land to protect the unusual ecosystem. Today, a boardwalk brings you into the habitat, crossing about 10 acres of the swamp. The park encompasses most of the remaining cypress stand, but some trees remain on nearby private property.
    Delaware has another stand of cypress trees on the Eastern Shore in Trap Pond State Park.
    Some of ­Battle Creek’s cypress are ex­tremely old. “The oldest tree we know of is around 500 years old,” Steele says. This tree can’t be seen from the main boardwalk, but you can visit it on an annual guided hike (calvertparks.org).
    Bald cypress trees are interesting in that they are deciduous conifers, meaning that they have needles like an evergreen but drop those needles in the fall just as oaks and maples lose their leaves. Cypress also grow knees, root system knobs that grow up out of the soil rather than staying underground.
    “The function of these growths is something of a mystery,” according to the Arbor Day Foundation, “although some believe it is a way to help the roots get oxygen.”
    Cypress provide valuable habitat to many creatures, especially the prothonotary warbler, a small yellow bird that likes to nest in the trees’ knees.
    As for the name, Battle Creek is the small stream that flows through the park, named in honor of the town of Battle, England, the ancestral home of the original owners of the land.


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