According to Lang Elliot (Music of The Birds, A Celebration of Bird Song, 1999), the Winter Wren’s song may last ten seconds or more, with each song being a rapid series of high-pitched tinkling notes coming at a rate of 15 per second or faster.
Back when I was a college professor, I was able to teach a marine invertebrate zoology summer course about every four years at a marine biology station on Fidalgo Island, just south of Anacortes, Washington. One of the extended field trips we took every year was to the Olympic National Park Ocean Beaches west of Forks, Washington to visit the tide pools during the lowest tides of the summer. We would spend several nights at a campground on the Sol Duc River near La Push and the Quileute Indian Reservation. I have very fond memories of the singing of the Winter Wrens in the moist forest cover at this camp ground and along the trails to the beach.
If you have never heard the song of the Winter Wren or seen one singing, here is a 3 minute video by Lang Elliot of a singing Winter Wren, at both normal speed and slowed down to 1/3 speed (just click on the picture of the wren). It is beautiful! By the way if you are songbird carver and need reference photos of singing birds, you can’t do much better than the photos in Lang Elliot’s book cited above.
NOTE (added 9/1/10): Since the above was written in late August, I have learned that the American Ornithologist's Union, the official organization responsible for English bird names and bird taxonomy in the U.S., recently split the two North American subspecies of the Winter Wren into separate species. This has resulted in the Pacific Wren, Troglodytes pacificus, found in northwestern North America, and the eastern "Winter" Wren, Troglodytes hiemalis. Both were split from the Eurasian Wren, Troglodytes troglodytes, found in Eurasia. Research conducted in 2008 found strong evidence that where the former eastern and western subspecies of the Winter Wren coexist, they do so without hybridization - the essence of the accepted Biological Species Concept. There are song and call differences between the two, as well as subtle plumage differences.
Of course, common name usage being what it is, most lay pople will probably continue to refer to these two species simply as the "Winter Wren."
Since this bird was carved and painted mostly from references of the Winter Wrens from the northwest, I would like to think it is really a carving of the new Pacific Wren. Although I strive to carve birds realistic enough that you would think they could fly, I have not yet managed to get one to sing, so your guess is as good as mine!