The Pacific Wren is a tiny woodland bird who has an elaborate song. Per unit weight, the Pacific Wren delivers its song with 10 times more power than a crowing rooster and has 36 notes per second on average This wren is dark brown and mottled overall. It has a short tail that it holds upright. They are found most often in closed-canopy forests at all elevations, as long there is dense understory. Within forests, brush piles, fallen logs, and stream banks.
Males establish and defend territories and attract females by singing. Males may nest with more than one female at a time. Nests are built in natural cavities, usually within six feet of the ground. The cavities can be in upturned roots of downed trees or rotten stumps, old woodpecker holes, rock crevices, even under porches, or any other low cavity. Male and female build the nest together on a platform of twigs. The nest cup is made of grass, weeds, moss, and rootlets, lined with hair and feathers. The female incubates 5 to 6 eggs for 12 to 16 days. Both parents feed the young.
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