The latest date that the Cerulean Dancer had until now been observed in Arizona was 15 November (2014; http://azdragonfly.org/news/cerulean-dancer-argia-anceps-santa-cruz-co-a...). On 18 November 2017, 24 individuals, including one pair in tandem, were found at the Sonoita Creek State Natural Area, which extends the known flight period of the species in the state by several days.