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 4b. Males. Measured data comparing the morphometrics of three Barn Owl species units: Tyto alba, T. furcata, and T. javanica. Note the total sample size of each group changes depending on the morphometric because not every owl had complete morphometric measurements. Significant results are highlighted in grey. Adjusted p-values used Holm correction.

MEASURED METRICS		Male
		T. alba (ntotal =164)	T. javanica (ntotal =103)	T. furcata (ntotal =311)	Significance (Kruskal-Wallis)		Dunn Test (p-adj)
Tail Length (mm)	Median	107	108	121	P-value	χ2	alba - furcata	8.47E-40
	IQR	5	7	12	1.38E-49	225.01	alba - javanica	4.88E-01
		n=158	n=100	n=303			furcata - javanica	1.17E-25
Tarsus Length (mm)	Median	64.7	68.0	76.2	4.34E-49	222.72	alba - furcata	2.64E-45
	IQR	4.8	4.0	7.5			alba - javanica	2.01E-03
		n=163	n=99	n=309			furcata - javanica	3.88E-17
Minimum Tarsus Width (mm)	Median	4.4	5.3	5.2	6.15E-49	222.02	alba - furcata	1.27E-41
	IQR	0.4	0.6	0.6			alba - javanica	2.56E-33
		n=162	n=100	n=310			furcata - javanica	5.72E-02
Hallux Talon Length (mm)	Median	16.3	17.4	19.1	6.29E-51	231.19	alba - furcata	1.38E-50
	IQR	1.3	1.9	1.8			alba - javanica	1.38E-50
		n=159	n=101	n=307			furcata - javanica	1.06E-10
Feathered Tarsus Ratio	Median	0.90	0.80	0.90	1.38E-08	36.195	alba - furcata	1.61E-04
	IQR	0.10	0.10	0.20			alba - javanica	1.11E-08
		n=159	n=94	n=299			furcata - javanica	1.31E-03
Culmen Length (mm)	Median	18.9	21.2	21.3	5.99E-50	226.68	alba - furcata	2.22E-44
	IQR	1.3	1.2	1.9			alba - javanica	2.22E-31
		n=162	n=101	n=304			furcata - javanica	3.05E-01
Wrist to Tip Length (mm)	Median	287	276	327	2.24E-65	297.72	alba - furcata	1.86E-42
	IQR	12	16	21			alba - javanica	2.02E-02
		n=157	n=93	n=303			furcata - javanica	1.20E-43