Why am I seeing more mosquitoes? Since they are cold-blooded, they do hibernate or die off in the winter, meaning in fall months mosquitoes are getting ready for winter. The brisk temperatures of fall also mean mosquitoes are more active during the day, instead of in the evening. If you have a mosquito problem in Muskoka or Orillia contact TK Pest Control to take care of your problem! www.TKPestControl.com