Formosan sika deer to about 300 m elevation. Sika, like many deer, prefer areas of mixed forest, scrub, and open land. Under natural conditions the low-lying alluvial plain that stretches from present-day Taipei along the west coast almost to the southern tip of the island were prime deer habitat and natural populations would have been quite dense. Sika populations in Taiwan have been heavily influenced by human activity for the past four hundred years. Until the early 17th century the human population of Taiwan was low and comprised mostly Austronesian peoples who had been living on the island for thousands of years. During
Animal repellent effective, such as repellent chemical Spray, electronic pet barrier, motion activated sprinkler etc. In Addition, vinegar can be used as organic pet repellent. The ideal repellent is completely specific for the target animal; that is, it drives away the animal that one wishes to repel "without" affecting or harming any other animals or people. One type of animal repellent may be effective for raccoons, while another animal repellent may be more effective for skunks. It can be difficult to design a repellent method that drives away only undesirable animals while having no effect on people or other creatures. Animal repellent