toot route
n.— «We know more about saw-whets now than we did 10 years ago, because of an innovative survey technique called a “toot route” that was used by the Game Commission in 2000 and 2001 to locate saw-whets.» —“Second Breeding Bird Atlas Survey Documents Important Changes” by Pennsylvania Game Commission in Harrisburg, Pa. Yahoo Finance May 31, 2005. (source: Double-Tongued Dictionary)