Table 1

Sample	Species	Monthly growth rate in mm / day
Primary feather	California condor	4.5 – 6^a
Primary feather	Oriental white-backed vulture	4.7^b
Hair (mane)	Horse	0.59^c 0.77 – 0.8^d 0.72^e
Hair (flank)	Calf	0.21 - 0.25^f
Hair (shoulder)	Domestic dog	0.49 – 0.96^g
Hair	Human	0.36^h,i
Nail	Human	0.10^j

^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.