Sample Species Monthly growth rate in mm / day
Primary feather California condor 4.5 – 6a
Primary feather Oriental white-backed vulture 4.7b
Hair (mane) Horse 0.59c
0.77 – 0.8d
0.72e
Hair (flank) Calf 0.21 - 0.25f
Hair (shoulder) Domestic dog 0.49 – 0.96g
Hair Human 0.36h,i
Nail Human 0.10j
aSnyder et al. [231]
bHouston [166]
cWhittem et al. [232]
dPopot et al. [140]
eTracey et al. [233]
fGaillard et al. [131]
gGunaratram and Wilkinson [137]
hSachs and Raff [234]
iWennig [235]
jLin et al. [128]
Table 2: Monthly growth of selected keratinous matrices in various species.