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Health & Fitness

Where are the Bugs in the Winter?

Most of the Atlanta area is snowed or iced in for the second time this year.  You are probably not seeing much insect activity, but have you ever asked yourself, “Where do all the bugs go in the winter?”  There are several different ways that insects try to survive the cold winter temperatures.

1.  Migration
We all know that birds fly south for the winter.  Did you know there are some insects that do the same?  A great example of this is the Monarch butterfly, which travels all the way to Mexico each winter.  Other insects migrate down into the ground to get below the frost level.

2.  Communal Living
You’ve heard the phrase “safety or strength in numbers.”  Some insects like ants and honey bees cluster together to make “warmth in numbers.”  The bees’ wing activity can raise the temperature in the hive above freezing.  If we have a power outage tonight, my family may be snuggled together to get “warmth in numbers,” too!

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3.  Dormancy
Many insects become dormant in a state of hibernation called diapause.  The inactive state of suspension helps synchronize the insect’s life cycle with seasonal changes in the environment.  Insects can become dormant at different stages.  For example, praying mantids and tent caterpillars spend the winter as eggs.  Others spend the winter as larvae.  One example of this is the wooly bear caterpillar, which curls up in thick layers of leaf litter.  The next stage is pupae.  The black swallowtail butterfly spends the winter as a chrysalid, or cocoon.  Still other insects overwinter as adults.  Mourning cloak butterflies, for example, tuck themselves behind loose tree bark or in tree cavities.  Many insects, like ladybugs and boxelder bugs, move in our homes and spend the winter in wall voids and attics.

4.  Cold Hardening
Some insects produce cryoprotectants, or their own “antifreeze.”  By producing a glycerol substance, insects can “supercool” themselves which allows their body fluids to drop below freezing points without causing ice damage.  The smaller the amount of water, the better they can supercool without freezing.  Because of this, smaller arthropods like ants or tiny spider mites can cool to colder temperatures than larger insects, like grasshoppers.

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5.  Staying Active
Lastly, a few insects actually stay active during the cold months.  One example of this is a type of springtail, also called snow fleas.  They can sometimes be seen looking like pepper jumping in the snow.

Despite the cold and nasty weather we are currently having, warmer days and more insects are right around the corner.  By next Friday, they are calling for temperatures that reach 70 degrees!  Before the insects start to make their way out of hibernation, get your home protected from Mid-Georgia Pest Control.  Call us at (770)962-4240 to see how we can serve you.

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