Sika deer sika deer. All "Cervus" species can crossbreed and produce hybrids in areas where they coexist (for example, introduced sika hybridize with native red deer in the Scottish Highlands, where this is a serious threat to the gene pool of the red deer population). Serious genetic pollution has occurred in many populations, especially in China. Therefore, the status of many subspecies remains unclear. The status of "C. n. hortulorum" is particularly uncertain and might in fact be of mixed origin, hence it is not listed here. The sika deer is one of the few deer species that does not lose its
Pack animal Pack animal A pack animal or beast of burden is an individual or type of working animal used by humans as means of transporting materials by attaching them so their weight bears on the animal's back, in contrast to draft animals which pull loads but do not carry them. Traditional pack animals are diverse including camels, goats, yaks, reindeer, water buffaloes, and llamas as well as the more familiar pack animals like horses, donkeys and mules. The term "pack animal" is traditionally used in contrast to "draft animal", which is a working animal that typically pulls a load behind itself