The most recent newcomer is the Chinese water deer, which became established in the wild in the 1920s.

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The others - muntjac, sika and Chinese water deer - were introduced in the past 150 years.

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One thing's clear, however: The artist purposely chose to position each image above a protruding ridgeline that runs along the cave wall, symbolizing either the surface of the water or tall grass that's obscuring the lower half of the deer.

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The event will start with a 400m swim in Studley Royal Lake, a 10km bike ride through the medieval deer park before finishing with a 2.5km run through the water gardens and ruins of Fountains Abbey.

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The calm serenity of paddling in sync, quietly gliding along the water and listening to the birds, seeing starfish sunbathing on the rocks and even watching a deer chill out right by your campsite, content to share your space.

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So much wildlife has been displaced from its natural habitat that deer were running loose in the streets, desperate for water.

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"We have reports of deer foaming at the mouth and panting as they cross bodies of water, " said Gast.

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The tribe has imported animals from all over the globe--water buffalo, wild boar, and Axis, fallow and red deer.

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Nestle, the Swiss company that makes Poland Spring, Nestle Pure Life, Deer Park and other brands, has nearly half of the share of the bottled water market.

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