Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
A slightly teneral cassinii female with its wings trapped in its exuvia. (I freed it after taking the photo, but I doubt the wings would recover.)
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
This individual shows interesting, extensive pigment aberration; size and body proportions are consistent with cassinii, despite the orange underside.
Ryerson Conservation Area: robust choruses of septendecim and cassinii, with cassinii increasing in volume as the day warmed.
Mating pair with strikingly orange-edged male and typical cassinii female, seen at meadow edge near forest in Morton Arboretum. Sound recording, taken in same area, captures loud, undulating cassinii chorus.
The male seemed moribund, possibly in the earlier stages of fungus infection?
Recording of both M. tredicim (low pitch call) and M. neotredicim (higher pitched call); chorus is mostly of tredecim, and neotredecim comes in later.
Recording of both M. tredicim (low pitch call) and M. neotredicim (higher pitched call); chorus is mostly of tredecim, and neotredecim comes in later.
Recording of both M. tredicim (low pitch call) and M. neotredicim (higher pitched call); chorus is mostly of tredecim, and neotredecim comes in later.
Recording of both M. tredicim (low pitch call) and M. neotredicim (higher pitched call); chorus is mostly of tredecim, and neotredecim comes in later.