Morphological assessment of the Common Barn Owl Tyto alba (Strigiformes: Tytonidae) supports three species Author Daugherty, Rachel L. 55732 Ninepipe Rd, Charlo, MT 59824, USA Author Brown Iii, Andrew J. Global Owl Project, Buckeystown, MD, USA Author Salas, Vanessa G. Centro de Investigaciones en Ecología y Zonas Áridas Sabana Larga, Santa Ana de Coro, Estado Falcón, Venezuela Author Contreras, Francisco J. Centro de Investigaciones en Ecología y Zonas Áridas Sabana Larga, Santa Ana de Coro, Estado Falcón, Venezuela Author Chávez, Rayben Instituto de Salud Agricola Integral, Calabozo estado Guárico, Venezuela Author Mendes, Gabriela C. Universidade Estadual de Maringá, Maringá, Paraná, Brazil Author Nestler, James R. Department of Biology, Walla Walla University, Walla Walla, WA, USA Author Johnson, David H. Global Owl Project, Alexandria, VA, USA text Zootaxa 2026 2026-01-28 5752 3 399 416 https://doi.org/10.11646/zootaxa.5752.3.5 journal article 10.11646/zootaxa.5752.3.5 1175-5326 19172123 BB465B8A-2D7C-48EB-BFF9-3AECAD71CE55

TABLE 2. Shrinkage analyses of male museum and live specimens of barn owls from the Pacific Northwest (Washington, Oregon, and Idaho). Non-parametric tests were chosen when data were not normally distributed.

Male Morphometrics	Museum	Live	Test Type	Significance	Test Value	n(museum)	n(live)
Tail Length	122±4.2	128.21±4.39	T-test	<0.001	t = 6.0	30	42
Tarsus Length	76.09±3.16	77.63±1.66	T-test	0.009	t = 2.7	30	41
Tarsus Width	5.24±0.29	5.64±0.40	T-test	<0.001	t = 4.6	30	41
Hallux Talon Length	19.1±0.93	19.58±0.75	T-test	0.020	t = 2.4	30	42
Culmen Length	20.9±0.72	21.94±0.85	T-test	<0.001	t = 5.4	30	41
Feathered Tarsus Ratio	0.94±0.05	0.98±0.06	Wilcox	0.006	W = 799.0	29	41
Wrist to Tip	333.28±10.36	335.37±8.29	T-test	0.353	t = 0.9	29	41
P1 Length	190.79±6.25	194.55±9.12	T-test	0.060	t = 1.9	29	40
P2 Length	202.59±5.97	207.1±8.73	T-test	0.019	t = 2.4	29	40
P3 Length	217.83±6.81	221.23±9.14	T-test	0.096	t = 1.7	29	40
P4 Length	234.04±7.31	238.3±8.77	T-test	0.039	t = 2.1	28	40
P5 Length	255.04±6.57	258.08±8.53	Wilcox	0.119	W = 685.5	28	40
P6 Length	278.69±7	282.1±8.56	T-test	0.083	t = 1.8	29	40
P7 Length	303.15±8.08	306.0 5±8.09	Wilcox	0.082	W = 676.5	27	40
P8 Length	324.81±8.92	326.9±8.48	T-test	0.337	t = 1.0	27	40
P9 Length	332.72±10.18	333.95±8.20	T-test	0.582	t = 0.6	29	40
P10 Length	330.79±11.53	334.65±8.49	T-test	0.114	t = 1.6	29	40