We came across these mysterious man-made structures along a Forest Service road in the Colville National Forest outside of Northport, WA. These images were taken on 24 August 2009.
These logs are connected together and stretch approximately 15 feet up the slope and perhaps 75 feet down the road.
Here is another example, found slightly off the road along a side trail.
The answer will be included in the next What is This post.
We encourage you to submit your thoughts using the Comments link below.
Answer to What is This #4 – (SwanLake) Posted 9-2-2009:
This freaky little critter is a predatory Ant Lion! You've likely seen their dimpled burrows in sandy soil. When ants fall into the ant lion's funnel-like burrow they cannot clamber out and quickly fall prey to the larger insect's massive pincers. I've seen ant lion burrows for years, but never thought to feed them (they move fast when you drop an ant into their trap!) or dig one up until we met the Pfaff family at Swan Lake. Thanks to Danny, Robbie, Katy and Amy for teaching us about these cool insects!
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