Regularly on October 8th, 9th, or 10th the first Brown Creepers may be expected from the north, remaining until from the 10th to 20th of April.  They are most numerous during the second and third weeks of October and in the first week of April.  During migration they are distributed over the entire county wherever there are trees.  In winter they seem to prefer the woods bordering the prairie regions, though they are common on the bluffs and in the bottom timber, especially in the large timber of  the Indian Creek Valley.  During the latter period of their stay they are sometimes heard in full song.