When pests are most active.

A month-by-month view of when each pest is most active. Use it to know what to watch for, when to inspect, and when to call a pro.
Dormant
Low
Moderate
Peak
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Ants
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Bed Bugs
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Cockroaches
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Earwigs
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Fleas
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Mosquitoes
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Moths
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Rodents
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Scorpions
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Silverfish
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Snakes
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Spiders
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Termites
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Ticks
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Wasps & Hornets
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Wildlife
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Plan ahead

What to do, month by month.

Most homeowners only call a pro after the problem starts. Use the notes below to schedule inspections before peak months and head off infestations early.
Ants
Peaks: April, May, June, July, August
Indoor scouts in early spring as colonies wake; full foraging mid-summer.
Bed Bugs
Peaks: June, July, August, September
Year-round indoors; reproduction speeds up in summer heat and during peak travel months.
Cockroaches
Peaks: May, June, July, August
Outdoor populations surge in summer; indoor activity rises as fall pushes them inside.
Earwigs
Peaks: May, June, July
Peak in warm, damp early-summer nights; often appear after irrigation or rain.
Fleas
Peaks: June, July, August, September
Eggs and larvae thrive in humid heat; pets bring adults indoors year-round.
Mosquitoes
Peaks: May, June, July, August
First broods hatch with the first warm rain; peak biting through high summer.
Moths
Peaks: June, July, August
Pantry and clothes moths spread fastest in warm months when adults are flying.
Rodents
Peaks: January, October, November, December
Move indoors as temperatures drop; peak indoor sightings October through February.
Scorpions
Peaks: May, June, July, August
Active at night through warm months in arid regions; hide indoors during heat waves.
Silverfish
Peaks: Year-round
Steady activity year-round in humid spaces — basements, bathrooms, behind walls.
Snakes
Peaks: June, July, August
Emerge from brumation in spring; basking and hunting through summer; den again in fall.
Spiders
Peaks: August, September, October
Most species peak late summer and early fall when males roam for mates.
Termites
Peaks: April, May
Spring swarmers (April–May) are the clearest sign of an active colony.
Ticks
Peaks: May, June, July, August
Nymphs out in late spring; adults questing through summer in tall grass and edges.
Wasps & Hornets
Peaks: June, July, August, September
Colonies grow through summer; most defensive August–September before queens overwinter.
Wildlife
Peaks: October, November, December
Raccoons, squirrels, and skunks seek attics, sheds, and crawlspaces as nights cool.