Bison is one of 31 Rare Resources in the game and, if present on a map, available from the beginning. The resource appears as a group of four Bisons. Like all rare resources on land, they can be gathered by sending a Merchant from the Market to the resource location. Bisons provide the following benefits:main article.The research cost reduction affects both Granary tech lines and is cumulative with other bonuses like those from Sugar (-10% Food cost) or Science Research. Bison also give an important boost to early food production and should be one of the first resources to be connected, if they happen to be nearby.