Delaney, D.K. Grubb, T.G. Peter, L.L. Reiser, M.H. Beier, P. (1995) Effects of Helicopter Noise on Nesting Mexican Spotted Owls, Study Plan RM-4251-P3-E1-1, Progress Report No. 1, 1995 Field Season Summary. Guadalupe Ranger District, Lincoln National Fore

• Strix occidentalis lucida