Topography
The refuge has five varied habitats: freshwater tidal marsh, impounded water, woods, meadow and field. The diversity of such habitats in such a concentrated area make it a natural magnet for all forms of wildlife. In addition to the above mentioned there are a wide variety of fish species that can be found in both, Darby Creek, the lifeblood of Tinicum Marsh, as well as the 145 acre (0.6 km2) impoundment and the smaller, Hoy's Pond. They include brown bullhead, channel catfish, crappie, carp and small striped bass that utilize the wider expanses of Darby Creek, just before its confluence with the Delaware River, in the earlier stages of their development. The fields and meadows provide open areas where wide arrays of insects including several species of butterflies can be found foraging the dozens of species of wildflowers.
Read more about this topic: John Heinz National Wildlife Refuge At Tinicum
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