 Camera traps are becoming increasingly popular tools for studying animal populations due to their low cost and ease of use. However, these devices are not always suitable for monitoring smaller mammals like voles, which can be difficult to identify or capture. This paper investigated the accuracy of camera trap indices for two species of voles, myodes rufocanus and microtus economus, which differ in terms of habitat use and social organization. The authors compared the performance of camera trap indices against capture mark recaptured data collected over three years. They found that the best performing camera trap index was able to accurately estimate the number of voles present at any given time, regardless of the species. Additionally, they found that spatially aggregating camera trap indices over nearby cameras improved the accuracy of the index for the tundra vol. These results suggest that camera traps may be useful for monitoring rodent populations, especially when combined with other techniques.