|scientific name Coquillettidia perturbans |
Larvae attach to submerged roots of emergent aquatic vegetation. Adults are found in many habitats.
Mid/late June to fall.
The only Coquillettidia in Canada, (and the only Mansonine mosquito). Adult: Hind tibia with a broad ring of whitish yellow scales circling the distal third. Proboscis with a well-defined ring of whitish yellow scales located centrally. Larva: extremely distinctive, possessing antennae much longer than the head, the distal portion of which (beyond seta 1-A) being translucent and much longer that the proximal portion. The siphon is short, conical, and sharply pointed, and is unique among Canadian mosquitoes. Furthermore, the habitus of the larvae makes aids in diagnosis.
Eggs are laid in rafts on the water surface below stems of Carex. Upon hatching, larvae will spend a brief period of time at the surface before descending to the bottom of the wetland and burrowing into the substrate. Here, they insert their siphon into the roots of emergent plants in order to obtain oxygen. They will only detach if disturbed, and even then, only if water temperatures are above 12°C. They remain buried in the substrate for the (rather long) duration of their larval stage, and appear to continue feeding throughout the winter. During the pupal stage, the respiratory trumpets become heavily sclerotized, and are imbedded in the root while the siphon remains attached. The trumpet tips cannot be pulled from the stem, and break off when the pupa rises to the surface. Adults emerge in mid summer, and females take a blood-meal, often from several hosts. Feeding occurs predominately at dusk.
Relatively uncommon in Alberta, but not of conservation concern. Is a known pest and vector of EEE.
Females feed on the blood of birds and mammals, including humans and livestock. Larvae are presumed to feed on the detritus in which they are submerged.
Southern and Central Alberta. Within North America, it is found across Southern Canada (not collected from Newfoundland), south to Mexico and Florida.
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