The dry season form (DSF) is replaced by the wet season form (WSF)gradually.
"The transition of DSF to WSF and WSF to DSF of M. leda was found to occur around the end of April and the early of September, respectively..." May be August is overlap period.
https://www.researchgate.net/publication/267201264_Dry_and_wet_season_polymorphism_in_the_butterflies_1_Dry_and_wet_season_polymorphism_in_the_butterflies_Melanitis_leda_and_Mycalesis_mineus_Satyridae_Lepidoptera
Comments (4)