This tiny bird flushed from the prairie grasses this morning. It flew a short distance and dropped down. I could tell from the way it held it’s tail that it was a wren but I wasn’t sure which one. My Sibley’s guide said that the streaked back, extremely small size and weak flying fits with a Sedge Wren. The fact that it was hanging out in damp dense grass fits.
The Birds of Missouri book says that this is an uncommon migrant.