(5.07am, Dec, PA)

The most familiar call of saw-whets is the territorial tooting of males, but in fall and winter other calls may be more frequent, including whines, "ksew" calls and chitters. In this case the initial whines may have been a response to my presence, but they also coincided with a short-lived bout of hooting by a nearby pair of Great Horned Owls.
A cautionary note: I've heard wails from Eastern Screech-Owls that I thought might be saw-whets, but these are weaker and more tremulous:
probable Eastern Screech-Owl (11.48pm, Oct, PA)

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