 In October 2015, a composition survey was conducted for five herds of caribou that are on the border between BC and the Yukon. Carcross, Atlin, Swan Lake, Little Rancheria, and Horse Ranchers. The objective of the survey was to determine the ratio of bulls and calves in each herd. The survey was not meant to estimate the total number of animals in each herd. The black line shows the boundaries of the caribou herd ranges, and the brown line shows the flank path of the survey. The survey was designed to estimate bull and calf ratios, not population size. Early migration from running ranges to winter ranges for some herds resulted in fewer caribou scenes than expected. Calf recruitment indicated possible stable or increasing populations in Carcross, Atlin, and Swan Lake herds, and possible declining populations in Little Rancheria and Horse Ranchers. Bull to cow ratios were above provincial objectives for all herds except a Little Rancheria. Continue rut counts on a regular basis as funding allows? Conduct rut surveys earlier in October to ensure more caribou settings and accurate ratio estimates. Conduct a survey to estimate population size for Carcross and Atlin herds within the next two years. Create herd-specific management plans for all five herds surveyed.