I report on the effects of a total solar eclipse on calling birds at Market Lake Wildlife Management Area just north of Roberts, Idaho, on 21 August 2017. Market Marsh Wildlife Management Area (43.780° n, 112.194° W) was established in 1956 to restore the natural marshes around Market Lake, and consists of a system of levees separating marsh and open water. It covers 2052 hectares and is managed by the Idaho department of Fish and Game. on 21 August 2017, the partial eclipse at this site started at 10:15 Mountain daylight time, totality started at 11:32 and ended at 11:34, and the partial eclipse ended at 12:57 www.timeanddate.com/ eclipse/map/2017-august-21#). the national Weather Service measured the high for the day in nearby Idaho Falls at 28° C (http://w2.weather.gov/climate/index. php?wfo=pih), and the temperature dropped 7.2° C just before and during totality (local measurement).