Llama distinguished by the inhabitants of South America are recognized as distinct species, though with difficulties in defining their distinctive characteristics. These are: The llama and alpaca are only known in the domestic state, and are variable in size and of many colors, being often white, brown, or piebald. Some are grey or black. The guanaco and vicuña are wild, the former being endangered, and of a nearly uniform light-brown color, passing into white below. They certainly differ from each other, the vicuña being smaller, more slender in its proportions, and having a shorter head than the guanaco. The vicuña lives
Chile–Peru relations would remain under Chilean control until a later date, when there would be a plebiscite to decide which nation would maintain control over Arica and Tacna. Chile and Peru, however, were unable to agree on how or when to hold the plebiscite, and in 1929, both countries signed the Treaty of Lima, in which Peru gained Tacna and Chile maintained control of Arica. Relations remained sour because of the war. In 1975, both countries were on the brink of war, only a few years before the centennial of the War of the Pacific. The conflict was fueled by ideological disputes: