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Above calls were recorded at a spot I started using Spring of '10 about 6 miles from my house. Its an abandoned field on some state owned land. I think the trees surrounding this field give the Yellow-crowned Night-Heron's (YCNH) flight call a bit of an "echo" effect. Below, for comparison, is a YCNH recorded in flight during daylight at a nearby wetland.

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Yellow-crowned Night-Heron recorded 4-16-10 at 1:44 AM

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Yellow-crowned Night-Heron recorded 5-15-10 during "dawn chorus" at a nearby wetland

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