The Male Builds the Nest – Pacific Wren | Bob Armstrong's Nature Alaska

The male Pacific Wren usually builds more than one nest and the female chooses which one she wants.
Only the female incubates the eggs.
The female generally feeds nestlings more than male does, although the male’s contribution increases with older nestlings.
For good information on the Pacific Wren look at Toews, David P. L. and Darren E. Irwin. 2012. Pacific Wren (Troglodytes pacificus), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/720
These authors write The species is unique among North American wrens in its association with old-growth forests. It uses old-growth structures (snags, root masses, downed trees, and the bases of large standing trees) for nesting, foraging, and roosting.
And the presence of Pacific Wrens is correlated with riparian areas enriched with salmon-derived nutrients.
I often observe them feeding on the blow fly maggots on salmon carcasses.
In the nest on my back porch at least two wrens are spending the night in the nest this winter (2017)
For good information about wrens look at Big presence in a tiny package by Mary Willson