The River "S" Unit of the Ridgefield National Wildlife Refuge has a 4.2 mile auto tour route and 1.5 mile seasonal hiking trail. The auto tour is an excellent way to see the Refuge. A pair of binoculars is a must and a camera makes it even more fun !!!
Bull Thistle, Canada Thistle, and Sow Thistle.
The following is a collection of images taken of Thistle. Not all Thistle images are shown here, more can be found throughout the Trip Logs. Also, link out to the "Trip Logs" to see more images of various birds, wildflowers, and wildlife seen each day.
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Canada Thistle.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, May 29, 2007.
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Bull Thistle.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, June 26, 2007.
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Canada Thistle, with bee.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Left image taken July 1, 2007, right image taken July 7, 2007.
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Canada Thistle.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, July 14, 2007.
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Canada Thistle.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, July 14, 2007.
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Canada Thistle, going to seed.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, July 14, 2007.
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Tansy Ragwort, Canada Thistle, and Field Bindweed.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, July 14, 2009.
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Sow Thistle.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, July 28, 2008.
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Sow Thistle, buds.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, July 28, 2008.
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Bull Thistle.
Ridgefield National Wildlife Refuge, Washington, River "S" Unit.
Image taken, August 16, 2007.
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