Life On The Barrier Islands
About 400 Bankers inhabit the long, narrow barrier islands of North Carolina's Outer Banks. These islands are offshore sediment deposits separated from the mainland by a body of water such as an estuary or sound. The islands can be up to 30 miles (48 km) from the shore; most are less than one mile (1.6 km) wide. Vegetation is sparse and consists mainly of coarse grasses and a few stunted trees. Each island in the chain is separated from the next by a tidal inlet.
The Bankers' small stature can be attributed, in part, to limited nutrients in their diet. They graze mostly on Spartina grasses, but will feed on other plants such as bulrush (Typha latifolia), sea oats, and even poison ivy. Horses living closer to human habitation, such as those on Currituck Banks, have sometimes grazed on residential lawns and landscaping. Domesticated Bankers raised on manufactured horse feed from an early age tend to exhibit slightly larger frames.
Water is a limiting resource for Bankers, as the islands are surrounded by salt water and have no freshwater springs or permanent ponds. The horses are dependent on ephemeral pools of rainwater and moisture in the vegetation they consume. Bankers will dig shallow holes, ranging from 2.5 to 4 feet (0.76 to 1.2 m) in depth, to reach fresh groundwater. Occasionally, they may resort to drinking seawater. This gives them a bloated appearance, a consequence of water retention caused by the body's effort to maintain osmotic balance.
Read more about this topic: Banker Horse
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