Status and Trend of Regal Fritillary (Speyeria idalia) (Lepidoptera: Nymphalidae) in the 4th of July Butterfly Count Program in 1977–2014

Figure 7

Total Regal Fritillary individuals per total party-hours reported in core range each year, with regression trend line. This decline was far from significant in 1977–2014 but was significant in 1991–2014 (Table 3).