Global Short Term Trend: Increase of 10-25% to decline of 30%
Comments: Probably more or less stable overall, but Colla and Packer (2008) documented an increase in Ontario, while Michael Arbuster (pers. comm. to D. Schweitzer, September 5, 2008) noted that the species had been common through 2007 in Missouri but was scarce in 2008. This of course could just have been a natural locally bad year and no other reports of decline were found. Williams et al. (2009) also indicate a substantial increase in Ontario. This species is also now domesticated and (unfortunately perhaps) probably established where it is not native.
Global Long Term Trend: Relatively stable to increase of >25%