University of Maryland Extension


Back to Get Help

Insects are beneficial in many ways - whether it's pollinating our food crops, decomposing organic matter, or even helping solve crimes! But, they can also harm us by spreading diseases and damaging plants and structures. Sometimes an insect is a nuisance indoors but a beneficial outdoors.  To learn more about some of the insects commonly found in Maryland click on an insect name below.

Publication: (PDF) HG 41 Keys to Pests in Around the Home

AntsOdorous House Ant - Joseph Berger, Bugwood.orgFlies - Cluster Flies

(Photo:Whitney Cranshaw, Colorado State University,

cluster fly on wall

Ants - Carpenter

Carpenter Ant close up

Flies - Drain flies

drain fly

Boxelder Bugbox elder bug life stagesFlies - Fruit fliesclose up fruit fly
Brown Marmorated Stink BugsStink Bug adultFungus Gnatsfungus gnat on poinsettia
Carpet beetlescarpet beetle life stagesIndian meal moth

(Photo: Clemson University - USDA Cooperative Extension Slide Series,

Indian meal moths
Centipedescentipede close up


coiled millipede
Clothes Moths close up of clothes mothMulticolored Asian Lady BeetleAsian lady beetles
Clover Mitesorange mitePantry Pests
(Rice and Grain Beetles)
sawtoothed grain beetle
CockroachesAmerican cockroachPillbugs and Sowbugsrolled pillbugs
Cricketshouse cricketPowderpost Beetles

powderpost beetle and larva


earwigSilverfish and firebrats



(Photo: University of Florida Extension)

cat fleaSpiders

black widow spider - credit

Flies - House 
flies and metallic flies
house fliesSpringtails

(Photo: Susan Ellis,

magnified springtail

Bark Beetles

southern pine beetle

Maintained by the IET Department of the College of Agriculture and Natural Resources. © 2019. Web Accessibility