Figure 4From: Multiple differences in calling songs and other traits between solitary and gregarious Mormon crickets from allopatric mtDNA cladesNumbers of singing versus non-singing gregarious and solitary males, by year. Gregarious males were more reluctant to sing overall, although they were less reluctant to sing in 2005. This is the reverse of the trend seen in 2004, and the cause of a significant interaction between year and form (G-test: G1 = 10.64, P < 0.05).Back to article page