Bugs and spiders in Florida
Florida's warm climate keeps bugs showing up indoors for much of the year. The species recorded most often here are Asian lady beetles, yellow garden spiders, red imported fire ants and eastern carpenter bees, and American cockroaches are common too. The brown widow stands out, because it has more records here than any other Get-advice species.
Get advice if bitten
These are found in Florida. If you think one bit or stung you, call Poison Help at 1-800-222-1222; call 911 for trouble breathing or swelling.
Common in Florida
Established here or recorded often, most-recorded first.
Asian lady beetleBe carefulCommon · 10,424 records
Yellow garden spiderBe carefulCommon · 4,910 records
Red imported fire antBe carefulEstablished · 4,750 records
Eastern carpenter beeBe carefulCommon · 3,568 records
Brown widowGet adviceEstablished · 2,279 records
American cockroachBe carefulCommon · 1,485 records
Pill bugHarmlessCommon · 1,176 records
Greenhouse millipedeHarmlessCommon · 1,046 records
Southern house spiderHarmlessCommon · 1,015 records
Lone star tickGet adviceEstablished · 995 records
Southern black widowGet adviceEstablished · 634 records
Eastern yellowjacketBe carefulCommon · 521 records
Tan jumping spiderHarmlessCommon · 435 records
Spotted orbweaverHarmlessCommon · 407 records
Bold jumping spiderHarmlessCommon · 319 records
Yellow fever mosquitoBe carefulEstablished · 296 records
Blacklegged tickGet adviceEstablished · 214 records
Black carpenter antHarmlessCommon · 206 records
German cockroachBe carefulCommon · 184 records
American dog tickGet adviceEstablished · 177 records
Carolina wolf spiderBe carefulCommon · 142 records
Argentine antHarmlessCommon · 128 records
Indianmeal mothHarmlessCommon · 128 records
Varied carpet beetleHarmlessCommon · 119 records
Brown marmorated stink bugHarmlessCommon · 106 records
House flyBe carefulCommon · 81 records
Long-bodied cellar spiderHarmlessCommon · 60 records
Common house spiderHarmlessCommon · 44 records
House mosquitoBe carefulEstablished · 38 records
Pharaoh antBe carefulCommon · 37 records
Odorous house antHarmlessCommon · 36 records
Cat fleaBe carefulCommon · 27 records
Bed bugBe carefulCommon · 26 records
Northern black widowGet adviceEstablished · 24 records
Brown dog tickGet adviceEstablished · 7 recordsWhat to watch for in Florida
Three widow spiders are established in Florida: the brown widow, the southern black widow and the northern black widow. Brown widow bites are usually much milder than black widow bites, but it is a true widow and easy to mix up with a young black widow, so get medical advice after any bite you are worried about. Poison Help is 1-800-222-1222.
Ticks established here are the lone star, blacklegged, American dog and brown dog tick. The lone star tick is the most recorded, and its bites are linked to alpha-gal syndrome, a red-meat allergy. All can carry disease. Red imported fire ants are established, eastern yellowjackets are common, and the yellow fever mosquito and house mosquito are both established.
Through the year
- Spring
- Eastern carpenter bees are busiest in April through June, lone star tick adults are most active about April through June, and pill bugs turn up after long rainy periods.
- Summer
- American cockroaches and house flies peak in the heat, greenhouse millipedes appear after heavy rain, and mosquito season can run longer than the usual June through October.
- Fall
- Yellow garden spiders are most noticed in late summer and early fall, and Asian lady beetles, the most-recorded species here, move in during October and November.
- Winter
- Brown widows can be found year-round in Florida, and German cockroaches, pharaoh ants and cat fleas stay active indoors through the cooler months.
Seen now and then
Recorded a few times; often brought in on plants, firewood or luggage.
Dark fishing spiderBe carefulOccasional · 21 records
Brown-banded cockroachBe carefulOccasional · 16 records
House cricketHarmlessOccasional · 8 records
Western conifer seed bugHarmlessOccasional · 8 records
Northern yellow sac spiderBe carefulOccasional · 6 records
House centipedeBe carefulOccasional · 5 records
European earwigHarmlessOccasional · 4 records
Drugstore beetleHarmlessOccasional · 4 records
False black widowBe carefulOccasional · 3 records
Woodlouse spiderHarmlessOccasional · 3 records
European paper waspBe carefulOccasional · 3 records
Boxelder bugHarmlessOccasional · 3 records
Drain flyHarmlessOccasional · 3 recordsLists come from research-grade iNaturalist sightings (Florida: 1,287,832 arthropod records) and, for dangerous species, published range maps. A species with few records may be a hitchhiker. Counts pulled Oct 18, 2026.
