Linear measurements (mean and range in mm) of adult Bald Eagles from southern (Georgia, Florida, Louisiana, Baja California) and northern (Alaska, Northwest Territories, Maine, Massachusetts, New York, Pennsylvania, Virginia, Arkansas, Iowa, and North Carolina) populations from Friedmann 1950; Alaska data from Imler and Kalmbach 1955.
Southern populations
Northern populations
Alaska
Wing-chord
Male
529.2 (515–545, 16)
588.6 (570–612, 29)
585.7 (555–612, 35)
Female
576.5 (548–588, 11)(1)
640.2 (605–685, 16)
625.1 (590–655, 37)
Tail
Male
248.5 (232–264, 16)
309.7 (290–322, 29)
289.8 (274–302, 35)
Female
271.2 (247–286, 11)(1)
339.4 (300–365, 16)
304.0 (282–325, 37)
Culmen
Male
49.8 (49–52, 16)
52.5 (49–57, 29)
65.3 (62–68, 35)
Female
32.7 (30–35, 11)(1)
54.1 (47–58, 16)
71.4 (68–75, 37)
Tarsus
Male
96.0 (95–97, 16)
99.8 (84.5–106, 29)
—
Female
103.0 (101–107, 11)(1)
101.9 (83–110, 16)
—
Toe
Male
61.5 (60–63, 16)
70.4 (67–74, 29)
—
Female
71.8 (66–77, 11)(1)
74.5 (70–82, 16)
—
(1)Wing measurements based on 42 individuals; culmen measurement for southern females by Friedmann (10
Friedmann, H. (1950). Birds of North and Middle America, Part 11. U.S. National Museum Bulletin no. 50.
) apparent in error.