Table 6. Apparent causes of nest failure for thick-billed longspur nests in Valley County, Montana, 2020–21. Percentages are based on 40 failed crop nests and 46 failed native nests in 2020 and 14 failed crop nests and 34 failed native nests in 2021. Determination was based on sign around the nest near time of failure; failed nests with uncertainty regarding the cause of failure were removed from these calculations.