Discipline: Veterinary Medicine
The gross and microscopic features of guard hairs from the head, dorsum, forelimb, hindlimb and tail of the Philippine brown deer and Visayan spotted deer were described through the direct visual observation and light microscopy. In both species, the hairs were dark brown in color except those in the hindlimb of male brown deer and forelimb of the male spotted deer which were light brown. The hair appeared longest (12-55 mm) in the male brown deer and shortest (5-30 mm) in male spotted deer. Except for the curved hair from the forelimb of the female brown deer, head of male brown deer and female spotted deer, all hairs examined were wavy. Only wide nodose continuous medullary pattern was observed in the brown deer. In addition to the wide nodose continuous pattern, absent and fragmental medullary patterns were also demonstrated in the spotted deer. The cross sectional shape of the hair from the head, forelimb and tail of male brown deer, head, forelimb and hindlimb of female brown deer, dorsum and tail of the male spotted deer and tail of female spotted deer was oblong. Those from the head and forelimb of the male spotted deer were circular. A concavo-convex cross-sectional shape was also observed from hairs taken from the dorsum and tail of male brown deer. Generally, the cross-sectional shape of the medulla followed that of the hair shaft except those hairs from the dorsum of female brown deer which had an oblong-shaped medulla and a biconcave hair shaft.