Appendix. 2. Geographical and sexual variation in measurements (mm) of adult Peregrine Falcon subspecies. Data shown as mean ± SD (range). Immatures average about 1% longer wing by sex, 4% longer tail in females, and 5% longer tail in males (n = 523). F. p. peregrinus and F. p. brookei are among those released in e. U.S. during reintroduction to indicate range of measurements. See Systematics: subspecies.

Subspecies and subgroupWing-chordTailTarsusToe without clawCulmen from cere
F. p. anatum(east) (1),(5)
   Male (n = 13)315.5 ± 5.04 (308–332)147.2 ± 7.04 (131–155)45.8 ± 2.5 (43–52)49.2 ± 1.81 (46–52)19.4 ± 0.09 (18–21)
   Female (n = 28)357.6 ± 4.72 (340–372)179.2 ± 8.78 (165–185)50.7 ± 3.67 (45–59)54.6 ± 1.53 (51–58)23.9 ± 1.24 (22–27)
F. p. anatum(west) (2),(5)
   Male (n = 36)306.0 ± 3.90 (291–318)142.6 ± 6.12 (130–155)45.8 ± 2.60 (42–50)47.3 ± 1.65 (43–52)19.8 ± 0.09 (18–22)
   Female (n = 45)349.8 ± 5.80 (333–363)170.3 ± 6.62 (160–187)51.4 ± 3.61 (44–58)53.2 ± 2.04 (48–59)23.9 ± 0.02 (20–25)
F. p. pealei(5)
   Male (n = 32)318.6 ± 5.17 (305–334)151.5 ± 5.78 (143–162)49.1 ± 2.22 (45–53)49.1 ± 1.15 (47–51)20.1 ± 1.36 (17–22)
   Female (n = 27)363.9 ± 5.84 (347–375)179.6 ± 4.50 (172–194)54.7 ± 2.01 (50–62)55.1 ± 1.48 (52–57)24.4 ± 1.01 (23–27)
F. p. tundrius(5)
   Male (n = 82)308.3 ± 4.74 (292–330)140.2 ± 4.94 (130–154)44.4 ± 2.52 0 (40–5)46.2 ± 1.35 (42–48)18.8 ± 0.04 (17–21)
   Female (n = 81)342.4 ± 6.42 (333–368)168.6 ± 5.56 (153–180)49.9 ± 3.33 (42–57)52.2 ± 1.80 (49–56)22.8 ± 0.30 (21–25)
F. p. peregrinus(3)
   Male (n = 14–20)309 ± 7.55 (291–320)144 ± 5.31 (134–156)46.9 ± 1.06 (45–49)47.2 ± 1.25 (44–49)20.0 ± 1.03 (18–23)
   Female (n = 16–23)356 ± 6.76 (348–367)173 ± 4.29 (163–180)53.5 ± 1.51 (51–56)53.7 ± 2.00 (50–57)24.0 ± 0.91 (22–26)
F. p. brookei(4)
   Male (n = 12–18)285 ± 10.39 (268–310)125 ± 6.14 (114–136)46.2 ± 2.90 (42–48)45.8 ± 1.48 (43–49)20.1 ± 1.26 (18–24)
   Female (n = 10–15)325 ± 6.26 (319–340)149 ± 6.06 (138–157)48.0 ± 2.03 (48–57)52.0 ± 1.74 (49–57)23.8 ± 0.86 (22–25)