Written By Michael “Doc” Weissmann, Ph.D., Chief Entomologist

Known as the snowmelt mosquitoes, these species have a short season in which to grow. In order to get a head start, the larvae are adapted to survive in very cold water, including snowmelt ponds and overflow pools from frigid mountain streams. The cold water slows down their metabolism as well as their development into a flying, biting adult mosquito, which can take several weeks.
One of the most widespread, and arguably most beautiful of these cold-adapted species, is the Alpine Snowmelt Mosquito, Aedes pullatus. This mosquito is often abundant throughout the summer in mountainous areas of western North America, Europe, and Asia. They occur mainly in higher elevations, although also found less commonly as low as sea level in the colder northern latitudes.
Yes, I did say “arguably most beautiful.” Most of the high altitude mosquitoes are primarily black-scaled with only a few scattered patches of pale scales, their dark coloration perhaps being an adaptation for maximizing heat absorption. Aedes pullatus is also primarily dark-scaled, but is adorned with white, golden, and yellow patches of scales on the top and sides of its thorax. The top of their abdomen also has distinct white-scaled basal bands on each segment. On a microscopic scale, these mosquitoes stand out from most other mountain species – beautiful.

Adults emerge throughout the summer. Males of this species have been reported to hover in great swarms just after sunset, often over a boulder or other solid landmarks in a forest opening, waiting for a receptive female to fly through the crowd. The resulting scramble results in one fast, lucky male getting to mate with her and father her next set of eggs – it isn’t known whether the female mates only once or if they seek out other males in the future. We also don’t know how long they live, or how many eggs females may lay in their lifetime.

An important component of any successful Integrated Mosquito Management (IMM) program is mosquito identification. Should you have any questions regarding mosquito identification, Vector Disease Control International (VDCI) is always available at whatever level of assistance you desire.
Michael “Doc” Weissmann is the Chief Entomologist has been identifying mosquitoes since the mid-1980s, and has been in charge of the VDCI Surveillance Laboratory in Colorado since 2003. Doc received his B.A. and M.A. in Biology from the University of Colorado, and his Ph.D. in Entomology from Colorado State University. He can be reached through the VDCI website or by calling 800.413.4445.
Contact the professionals at 800-413-4445 for all of your mosquito control needs.
Since 1992, Vector Disease Control International (VDCI) has taken pride in providing municipalities, mosquito abatement districts, industrial sites, planned communities, homeowners associations, and golf courses with the tools they need to run effective mosquito control programs. We are determined to protect the public health of the communities in which we operate. Our mosquito control professionals have over 100 years of combined experience in the field of public health, specifically vector disease control. We strive to provide the most effective and scientifically sound mosquito surveillance and control programs possible based on an Integrated Mosquito Management approach recommended by the American Mosquito Control Association (AMCA) and Centers for Disease Control and Prevention (CDC). VDCI is the only company in the country that can manage all aspects of an integrated mosquito management program, from surveillance to disease testing to aerial application in emergency situations.