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Nearly all deer have a facial gland in front of each eye. The gland contains a strongly scented pheromone, used to mark its home range. Bucks of a wide range of species open these glands wide when angry or excited. All deer have a liver without a gallbladder. Deer also have a tapetum lucidum, which gives them sufficiently good night vision.
Strong conservation efforts have allowed white deer to thrive within the confines of the depot. The white-tailed deer's horizontally slit pupil allows for good night vision and color vision during the day. Whitetails process visual images at a much more rapid rate than humans and are better at detecting motion in low-light conditions. [12]
Deer have seven types of external scent glands distributed across their bodies. These are the forehead glands (on the forehead), the preorbital glands (below the eyes), the nasal glands (inside the nostrils), the interdigital glands (between the toes), the preputial gland (inside the foreskin of the deer's penis ), the metatarsal glands ...
Musk deer can refer to any one, or all eight, of the species that make up Moschus, the only extant genus of the family Moschidae. [1] Despite being commonly called deer, they are not true deer belonging to the family Cervidae, but rather their family is closely related to Bovidae, the group that contains antelopes, bovines, sheep, and goats.
Muntjac have expanded rapidly, and are present in most English counties and also in Wales, although they are less common in the north-west. The British Deer Society in 2007 found that muntjac deer had noticeably expanded their range in the UK since 2000. [13] Specimens appeared in Northern Ireland in 2009, and in the Republic of Ireland in 2010.
Lichen is the primary food source for the Siberian musk deer. Musk deer have a preference for easily digestible nutritious foods that are both rich in protein and low in fibre. During periods of winter, musk deer can survive in even poorer food quality ranging in foods that are low in proteins but are high in energy and can be easily digested. [7]
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The ancestors of deer had tusks (long upper canine teeth). In most species, antlers appear to replace tusks. However, one modern species (the water deer) has tusks and no antlers and the muntjacs have small antlers and tusks. The musk deer, which are not true cervids, also bear tusks in place of antlers. [6]