Selected linear measurements (mm) of adults of the 5 species of Hawaiian honeyeaters, family Meliphagidae.(1)All measurements from museum specimens. Data shown as mean ± SD (range, n).

Kaua'i 'Ö'ö (48/30)O'ahu 'Ö'ö (5/5)Bishop's 'Ö'ö (21/4)Hawai'i 'Ö'ö (74/37)Kioea(2)(4)
Specimen length(3)
Male227 ± 10.0 (206–242, 16)282 ± 36.1 (256–307, 2)282 ± 15.2 (265–307, 10)310 ± 16.7 (286–345, 36)
Female198 ± 13.9 (179–225, 14)235 (n = 1)258 ± 11.3 (250–266, 2)249 ± 13.9 (229–278, 18)
Sex unknown329 ± 13.9 (320–345, 3)
Bill (exposed culmen)(4)
Male28.3 ± 1.5 (24–32, 46)30.9 ± 1.9 (28.7–33.5, 5)34.4 ± 1.9 (29–36.9, 18)28.7 ± 1.6 (23.8–31.8, 70)
Female26.3 ± 1.2 (24.8–29.3, 29)26.9 ± 1.3 (25–28, 5)30.3 ± 0.6 (29.5–30.9, 4)24.4 ± 1.1 (21.4–26.2, 35)
Sex unknown34.0 ± 3.1 (31.0–37.8, 4)
Bill width(5)
Male7.5 ± 0.6 (6.4–8.5, 27)8.8 ± 0.8 (8.2–9.4, 2)9.0 ± 0.6 (7.1–9.7, 14)7.9 ± 0.9 (6.3–10.6, 43)
Female6.9 ± 0.7 (5.8–7.8, 20)7.5 (n = 1)8.1 ± 0.5 (7.7–8.4, 2)7.1 ± 0.7 (5.8–8.5, 21)
Sex unknown10.4 ± 0.7 (9.8–11.1, 3)
Bill depth(6)
Male6.5 ± 0.3 (5.6–7.2, 27)7.5 ± 0.4 (7.2–7.7, 2)7.0 ± 0.3 (6.6–7.7, 14)6.6 ± 0.5 (5.7–7.8, 44)
Female6.0 ± 0.3 (5.6–6.7, 18)6 (n = 1)6.1 ± 0.8 (5.5–6.6, 2)5.7 ± 0.3 (5.2–6.6, 21)
Sex unknown9.2 ± 1.1 (8.2–10.4, 3)
Length of nasal opening
Male6.2 ± 0.5 (5.2–7.0, 22)10.1 ± 0.1 (10–10.2, 2)8.8 ± 1.1 (7.3–11.2, 14)7.0 ± 0.7 (5.2–8.4, 38)
Female5.4 ± 0.6 (3.8–6.2, 14)7.2 (n = 1)7.2 ± 0.8 (6.6–7.7, 2)6.0 ± 0.5 (5.2–7.0, 20)
Sex unknown7.7 ± 0.9 (7–8.3, 2)
Wing (unflattened)
Male99 ± 4.1 (90–111, 45)114 ± 6.9 (103–120, 5)116 ± 4.0 (109–125, 21)122 ± 5.3 (111–132, 73)
Female92 ± 4.1 (84–105, 30)106 ± 7.3 (99–116, 5)103 ± 1.7 (101–105, 4)105 ± 5.2 (96–116, 37)
Sex unknown139 ± 2.7 (137–143, 4)
Tail(7)
Male87 ± 7.2 (72–104, 41)144 ± 7.1 (134–151, 5)143 ± 13.8 (121–159, 15)182 ± 14.0 (118–201, 65)
Female79 ± 5.1 (67–88, 26)126 ± 8.1 (113–132, 5)112 ± 17.0 (93–130, 4)129 ± 10.3 (98–144, 35)
Sex unknown156 ± 9.5 (146–166, 4)
R1 extension(8)
Male18 ± 2.8 (12–22, 19)13 (n = 1)32 ± 10.9 (20–51, 9)54.1 ± 4.4 (43–64, 30)
Female15 ± 1.8 (11–18, 14)2 (n = 1)20 ± 2.1 (18–21, 2)31.4 ± 8.8 (22–58, 16)
Sex unknown14.1 ± 4.6 (10.8–17.3, 2)
Tarsus(9)
Male33.5 ± 2.1 (29.6–39.0, 48)35.9 ± 1.5 (34–38.3, 5)40.0 ± 2.1 (36.6–43.7, 20)39.3 ± 2.7 (29.2–46, 71)
Female31.6 ± 2.0 (28.8–38.5, 30)32.7 ± 2.4 (30–36, 5)34.5 ± 0.6 (34–35.3, 4)34.9 ± 1.8 (31.4–38.0, 36)Sex unknown
46.2 ± 3.1 (42–49, 4)
Mean tarsus diameter(10)
Male2.7 ± 0.1 (2.5–2.9, 26)2.9 (n = 1)3.1 ± 0.1 (2.9–3.2, 14)2.8 ± 0.2 (2.5–3.1, 40)
Female2.4 ± 0.2 (2.1–2.8, 20)2.5 (n = 1)2.4 ± 0.3 (2.2–2.6, 2)2.4 ± 0.1 (2.2–2.6, 21)
Sex unknown3.9 ± 0.4 (3.6–4.3, 3)
Middle toe with claw
Male26.4 ± 2.7 (21.7–31.7, 47)27 ± 1.4 (26–28, 2)29.6 ± 2.1 (25–34.4, 21)28.2 ± 2.8 (22–37, 71)
Female24.9 ± 2.1 (21.3–28.3, 30)22.9 ± 2.7 (21–24.8, 2)26.4 ± 1.8 (25–28.7, 4)24.4 ± 2.3 (19.3–28.7, 35)
Sex unknown34.9 ± 4.0 (31.0–40.3, 4)
Middle claw
Male7.5 ± 0.6 (6–9, 48)7.9 ± 1.6 (6.8–9, 2)8.3 ± 0.3 (7.9–9, 21)8.1 ± 0.7 (6–9.1, 71)
Female7.2 ± 0.7 (5.8–8.8, 30)6.5 ± 0.7 (6–7, 2)7.4 ± 0.5 (7–8.1, 4)7.1 ± 0.4 (6–8, 35)
Sex unknown8.8 ± 1.4 (6.8–10.0, 4)
Rear claw
Male10.8 ± 0.5 (9.5–11.6, 28)-11.5 ± 0.3 (11–11.8, 14)11.5 ± 0.5 (10.5–12.8, 41)
Female10.0 ± 0.4 (9.1–10.6, 20)9.6 (n = 1)10.5 ± 0.2 (10.1–10.4, 2)9.9 ± 0.6 (8.2–11.1, 20)
Sex unknown12.9 ± 0.9 (11.8–13.5, 3)