Linear measurements (mm) of the White-headed Woodpecker. Data from museum specimens (primarily from Museum of Vertebrate Zoology, Berkeley; University of California at Los Angeles; Los Angeles County Museum, Los Angeles; American Museum of Natural History, New York; National Museum of Natural History, Washington D.C.; and additional collections listed in acknowledgments). Data presented as mean ± SD (range; n).

P. a. albolarvatusP. a. gravirostris
Culmen length
Male27.8 ± 1.35 (24.1–30.5; 100)30.1 ± 1.17 (28.0–32.6; 46)
Female25.3 ± 1.06 (23.0–27.9; 70)26.7 ± 1.26 (24.1–30.6; 51)
Wing-chord length
Male127.0 ± 1.56 (124–129; 9)127.5 ± 1.24 (124–129; 14)
Female126.1 ± 2.78 (121–131; 15)126.4 ± 1.64 (124–129; 18)
Tarsus length
Male22.1 ± 0.99 (20.6–24.2; 17)22.8 ± 1.53 (20.6–26.8; 14)
Female21.4 ± 0.63 (20.9–22.7; 10)21.1 ± 0.77 (19.9–22.8; 18)
Tail length
Male83.7 ± 2.12 (80–87; 7)83.0 ± 2.93 (79–89; 12)
Female85.3 ± 4.00 (79–91; 10)82.7 ± 3.50 (78–90; 12)