Tuesday, April 14, 2009

A strong low pressure system moving through the eastern U.S. has put a bit of a halt to any migratory movement. On the backside of the low this mornings radar image shows some movement in the Great Plains. You can almost draw a straight line going north from Brownsville Texas to the North Dakota/South Dakota border that shows most of the movement in the U.S. over night.

Compared to the image from a couple of nights ago, the numbers of birds moving is probably not as impressive as the movement that brought migrants like Purple Finches, Yellow-rumped Warblers, Song Sparrows, Brown Creepers and a variety of waterfowl into the upper Midwest. As conditions stabilize before the next front moves through we may see more movement later in the week.

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