Most active year-round, especially in warm, humid conditions


Droppings, shed skins, and a musty odor are common signs


Flat, oval bodies with long antennae; usually brown or black

Most active in spring and summer during swarm season

Look for mud tubes, hollow-sounding wood, and discarded wings

Soft-bodied, pale insects; swarmers have wings and look like flying ants

Most active at night and year-round indoors

Signs include itchy bites, blood spots on sheets, and dark droppings

Small, reddish-brown, oval insects that resemble apple seeds

Most active in fall and winter as they seek warmth indoors

Signs include droppings, gnawed materials, and scratching sounds in walls

Brown or black with long tails; larger than mice with blunt snouts

Most active in spring and summer

Look for sawdust-like frass, rustling in walls, and winged ants indoors

Large, black or reddish ants; swarmers have wings and narrow waists

Most active in warm months, but can survive indoors year-round

Signs include pet scratching, flea dirt, and visible jumping insects

Tiny, dark brown insects with strong legs for jumping