| Sex | Age (yr) | O. o. leucorhoa | O. o. oenanthe | O. o. libanotica |
| Wing chord - natural (New World method; 289) | ||||
| Male | 2+ | 101.4 ± 1.94 (97.0–105.0, 39) (Canada-1) | ||
| 1+ | 101.2 ± 1.96 (97.0–106.0, 91) (Canada-1) | |||
| < 1 | 101.1 ± 2.02 (98.0–106.0, 49) (Canada-1) | |||
| Female | 1+ | 97.5 ± 1.89 (92.0–102.0, 122) (Canada-1) | ||
| Unspecified | < 1 | 101.7 ± 2.40 (96.0–108.0, 84) (Canada-1) | ||
| Wing chord - straightened and flattened (Old World method; 15) | ||||
| Male | 2+ | 102.9 ± 1.86 (99.0–107.0, 39) (Canada-1) | 98.5 ± 1.8 (93–103, 237) (Sweden-7) | |
| 1+ | 102.8 ± 2.03 (99.0–108.0, 90) (Canada-1) | 97.1 ± 1.9 (92–102, 356) (Sweden-7) | ||
| 95.8 (91–102, 94) (Germany-2) | ||||
| 100.9 ± 1.84 (95.5–106, 69) (Alaska-5) | ||||
| < 1 | 102.8± 2.11 (99.0–108.0, 49) (Canada-1) | 96.7 ± 2.18 (93–101, 41) (w Europe-2) | ||
| Unspecified | 102.5 ± 0.48 (24) (Unspecified-6) | 96.2 ± 0.26 (106) (Unspecified-6) | 94.2 ± 0.29 (94) (Unspecified-6) | |
| 102.6 ± 1.66 (99–107, 49) (Iceland-2) | 94.6 (90–105, 229) (Various-2) | |||
| 103.5 (29) (Iceland-3) | 97.7 (93–102, 26) (Unspecified-8) | |||
| 105.1 (101–110, 54) (Greenland-2) | ||||
| Female | 2+ | 95.1 ± 2.1 (90–101, 292) (Sweden-7) | ||
| 1+ | 99.2 ± 2.07 (93.0–105.0, 122) (Canada-1) | 94.3 ± 1.9 (89–101, 294) (Sweden-7) | ||
| 99.0 ± 1.80 (96–103, 23) (Iceland-2) | 92.1 (87–96, 97) (Germany-2) | |||
| 100.0 (26) (Iceland- 3) | 97.9 ± 2.01 (94–105, 73) (Alaska-5) | |||
| < 1 | 94.0 ± 2.13 (89–97, 26) (w Europe-2) | |||
| Unspecified | 102.9 (99–108, 53) (Greenland-2) | 93.0 (88–93, 73) (Various-2) | ||
| 94.0 (90–99,13) Unspecified-8) | ||||
| Unspecified | < 1 | 103.3 ± 2.47 (97.0–110.0, 84) (Canada-1) | 100.8 ± 2.32 (93.7–107.5, 105) (Alaska-5) | |
| First secondary to wingtip | ||||
| Male | Unspecified | 33.7 ± 0.26 (24) (Unspecified-6) | 31.0 ± 0.18 (106) (Unspecified-6) | 28.8 ± 0.l7 (94) (Unspecified-6) |
| Unspecified | < 1 | 34.80 ± 1.35 (32.6–37.0, 15) (Canada-1) | ||
| Tail length | ||||
| Male | 2+ | 58.4 ± 1.72 (55.0–62.0, 26) (Canada-1) | 54.5 ± 1.63 (52–57, 20) (w Europe-2) | |
| 55.9 ± 2.0 (44–61, 228) (Sweden-7) | ||||
| 1+ | 57.3 ± 2.05 (53.0–62.0, 66) (Canada-1) | 54.2 ± 1.8 (49–61, 342) (Sweden-7) | ||
| 54.1 ± 2.12 (49–60, 65) (Alaska-5) | ||||
| < 1 | 56.6 ± 1.91 (53.0–61.0, 39) (Canada-1) | 52.8 ± 1.73 (49–56, 41) (w Europe-2) | ||
| Unspecified | 56.9 ± 1.75 (54–60, 23) (Greenland-2) | 56.2 ± 0.22 (94) (Unspecified-6) | ||
| 58.3 ± 0.51 (24) (Unspecified-6) | 55.7 ± 0.23 (106) (Unspecified-6) | 56.8 (52–60, 26) (Unspecified-8) | ||
| Female | 2+ | 57.0 ± 1.41 (56.0–58.0, 2) (Canada-1) | 51.5 ± 2.09 (49–54, 8) (w Europe-2) | |
| 53.3 ± 2.1 (42–58, 278) (Sweden-7) | ||||
| 1+ | 54.4 ± 3.29 (28.0–60.0, 101) (Canada-1) | 52.2 ± 1.8 (48–58, 280) (Sweden-7) | ||
| 51.7 ± 1.89 (47–56.5, 71) (Alaska-5) | ||||
| < 1 | 51.4 ± 1.42 (48–53, 23) (w Europe-2) | |||
| Unspecified | 55.3 ± 1.48 (53–58, 16) (Greenland-2) | 53.8 (50–58, 13) (Unspecified-8) | ||
| Unspecified | < 1 | 58.0 ± 2.11 (51.0–62.0, 80) (Canada-1) | 53.5 ± 2.05 (48–57.5, 105) (Alaska-5) | |
| Tarsus length | ||||
| Male | 1+ | 29.1 ± 0.79 (27.3–30.8, 66) (Canada-1) | 27.5 ± 0.78 (26.1–29.9, 74) (Alaska-5) | |
| 27.2 ± 0.97 (25.5–28.9, 60) (w Europe-2) | ||||
| Unspecified | 29.1 ± 0.73 (28.3–30.7, 23) (Greenland-2) | 27.1 (25–29, 25) (Unspecified-8) | ||
| Female | 1+ | 28.2 ± 0.77 (26.6–30.1, 100) (Canada-1) | 26.7 ± 0.97 (25.4–28.2, 31) (w Europe-2) | |
| 27.0 ± 0.73 (25.6–28.4, 78) (Alaska-5) | ||||
| Unspecified | 28.5 ± 0.95 (27.4–30.2, 16) (Greenland-2) | 29.5 ± 0.7 (28.4–30.4, 16) (Sweden-7) | 25.9 (25–27, 13) (Unspecified-8) | |
| Unspecified | < 1 | 28.7 ± 0.74 (27.2–30.7, 79) (Canada-1) | 27.0 ± 0.74 (25.3–28.3, 105) (Alaska-5) | |
| Bill length: tip to skull | ||||
| Male | 2+ | 18.2 ± 0.8 (16.2–21.2, 193) (Sweden-7) | ||
| 1+ | 18.1 ± 0.68 ( 17.2–19.2, 27) ( Greenland-2) | 18.2 ± 0.8 (15.9–21.5, 279) (Sweden-7) | ||
| 19.0 ± 0.90 (16.8–21.0, 75) (Alaska-5) | ||||
| Unspecified | 18.3 (16.8–20.6, 20) (Unspecified-2) | 18.6 (17–20, 26) (Unspecified-8) | ||
| Female | 2+ | 17.9 ± 0.8 (15.0–20.0, 210) (Sweden-7) | ||
| 1+ | 18.0 ± 0.62 (17.2–19.0, 16) (Greenland-2) | 18.0 ± 0.8 (15.9–20.5, 224) (Sweden-7) | ||
| 18.5 ± 0.79 (16.2–20.5, 79) (Alaska-5) | ||||
| Unspecified | 18.2 (17.7–19.2, 9) (Unspecified-2) | 17.5 (15–19, 13) (Unspecified-8) | ||
| Unspecified | < 1 | 18.3 ± 0.74 (16.7–20.1, 105) (Alaska-5) | ||
| Bill length: tip of bill to feathers | ||||
| Male | 1+ | 13.0 ± 0.74 (10.2–14.4, 67) (Canada-1) | ||
| Female | 1+ | 12.9 ± 0.62 (10.7–14.8, 100) (Canada-1) | ||
| Unspecified | < 1 | 11.9 ± 0.64 (10.0–13.1, 78) (Canada-1) | ||
| Bill length: tip of bill to nares | ||||
| Male | 2+ | 9.9 ± 0.5 (8.7–11.1, 201) (Sweden-7) | ||
| 1+ | 10.0 ± 0.75 (8.8–11.9, 15) (Canada-1) | 9.9 ± 0.6 (8.2–12.2, 290) (Sweden-7) | ||
| Unspecified | 9.9 ± 0.56 (9 –10.8, 21) (Greenland- 2) | |||
| Female | 2+ | 9.9 ± 0.5 (8.3–11.6, 220) (Sweden-7) | ||
| 1+ | 9.8 ± 0.69 (8.9–12.1, 18) (Canada-1) | 9.8 ± 0.6 (8.4–12.6, 232) (Sweden-7) | ||
| Unspecified | 9.7 ± 0.45 (8.9 –10.3, 15) (Greenland-2) | |||
| Unspecified | < 1 | 9.4 ± 0.78 (6.2–10.2, 49) (Canada-1) | ||
| Tip of bill to back of skull | ||||
| Male | 1+ | 39.2 ± 0.81 (36.9–41.1, 61) (Canada-1) | ||
| Female | 1+ | 38.6 ± 0.75 (35.7–40.2, 94) (Canada-1) | ||
| Unspecified | < 1 | 38.4 ± 0.82 (36.2–40.0, 78) (Canada-1) | ||
| Skull width | ||||
| Male | 1+ | 18.2 ± 1.43 (15.9–20.2, 17) (Canada-1) | ||
| Female | 1+ | 17.8 ± 1.09 (16.0–19.8, 17) (Canada-1) | ||
| Unspecified | < 1 | 18.1 ± 0.60 (16.5–19.3, 55) (Canada-1) | ||
| Wing pointednessa | ||||
| Male | Unspecified | I5 = 0.902 (31) (Helgoland-4) | I5 = 0.911 (93) (Helgoland-4) | |
| Female | Unspecified | I5 = 0.906 (65) (Helgoland-4) | I5 = 0.912 (85) (Helgoland-4) | |
| Wing-shape Indexb | ||||
| Male | Unspecified | 0.29 ± 0.003 (24) (Unspecified-6) | 0.27 ± 0.002 (106) (Unspecified-6) | 0.25 ± 0.002 (94) (Unspecified-6) |
| Massc | ||||
| Male | 2+ | 23.2 ± 1.2 (20.4–28.6, 222) (Sweden-7) | ||
| 1+ | 28.5 ± 1.61 (23.8–32.2, 88) (Canada-1) | 22.8 ± 1.2 (20.0–25.5, 332) (Sweden-7) | 24.1 ± 2.14 (20–29, 41) (Various-9) | |
| 24.1 ± 2.38 (45) (United Kingdom-2) | ||||
| 24.4 ± 3.9 (21.5–33.1, 76) (Alaska-5) | ||||
| Female | 2+ | 23.0 ± 1.5 (19.5–29.9, 262) (Sweden-7) | ||
| 22.7 ± 1.5 (19.3–28.7, 286) (Sweden-7) | ||||
| 1+ | 28.3 ± 2.11 (23.6–35.3, 120) (Canada-1) | 24.3 ± 4.0 (22.1–33.1, 79) (Alaska-5) | 24.4 ± 2.80 (19–27, 10) (Various-9) | |
| 23.8 ± 2.08 (35) (United Kingdom-2) | ||||
| Unspecified | < 1 | 30.5 ± 2.18 (26.9–37.6, 83) (Canada-1) | ||
Sources: