The Eared Poor-Will

was first described by Brewster (1888) from a specimen collected by McLeod in Chihuahua. A second specimen was collected near San Marcos, Jalisco, by Lloyd, in 1889 and was recorded by Salvin and Godman (1894: 391). Thereafter, nothing new concerning the species was published for half a century. A previously unreported specimen (a female) in the American Museum of Natural History was taken by J. H. Batty on 31 May 1905 at La Laja, Jalisco, supposedly at ca. 3,000 meters, although, as noted below, this is most probably an inaccurate estimate. Finally, two more specimens were secured in Guerrero, in 1938 and 1941, by the veteran collector W. W. Brown, Jr. The first series (four specimens) was taken a few years later by W. J. Shefiler and E. N. Harrison on the Sonora-Chihuahua border. All of