Fig. 4
From: Mining morphometrics and age from past survey photographs
Tusk and body size measurements and musth indications possible in each image. Tusk and body size measurements obtainable in each image include (I-II) a) tusk diameter at lip line (1), b) tusk length from lip line to tip (2), c) shoulder height from scapula (3) to bottom of straight forelimb in foreground (4), d) body length: horizontal length from scapula (3) to anal flap (5), and e) foot diameter during stride). Facial features measurable in pixels in each image include (III) f) head girth measured from eye tear gland (6) to nasal cavity (7) and g) head height measured from tear gland to lip line. Indicators of non-musth (IV) or musth period (V-VI) distinguishable in images include temporal gland secretions (h) and urine dribbling (i)