Passage Summary: These birds like to sneak their eggs into other birds' nests to keep them safe. Even though bushes seem like the best hiding spots, the birds overwhelmingly choose to put their eggs in wooden birdhouses instead.

Reasoning: Common Eiders seek safe nests to avoid predation; while woody vegetation offers the most concealment, the birds most frequently choose nests in wooden boxes.

Analysis: The paradox lies in the choice of wooden boxes over the 'highly concealing' vegetation, given that the birds' goal is safety from predators. We need to explain why a wooden box is actually safer or more advantageous than a bush. Perhaps the boxes protect against a specific type of predator that can easily search the bushes, or maybe the boxes are simply easier for the egg-laying females to find. Look for an answer that provides a specific benefit to the wooden boxes that outweighs the concealment provided by the vegetation.