Insect Info Sheets

Learn about common California insects and arachnids

Whether it is your back yard or bath tub, insects can be found all over. Click on the image and a fact sheet will open up on some of the most common ones people encounter. This is the culmination of over 40 years of answering questions from the general public. We always welcome new suggestions for information sheets. Contact us with your ideas!
 
 
 
 
 

 

Ants

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Argentine ants
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Fire ants
 
 

 

 

 

Beetles

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Fig beetle
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Lady bugs, lady beetles
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Powder post beetle
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Black Walnut Borer
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Drugstore beetle
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Carpet beetle
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Darkling beetle, stink beetle
 

 

Wasps/Bees

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Carpenter bees
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Wool carder bee
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Horntail wasp
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Paper wasps
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Paper wasp comparison
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Bald-faced hornet
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Yellow jackets
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Key to yellow Jackets
 

 

Mites/Ticks

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Biting nest mites
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Ticks
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Hay itch mites
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House dust mites
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Medically important mites
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Mold mites
 

 

Spiders

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Sac spiders
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Wolf spiders
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Cellar spiders
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Recluse spiders, Brown recluse
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Widows
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Jumping spiders
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Spider bites
 

 

Flies

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Fungus gnat
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Spotted-winged fruit fly
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Scuttle flies
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House fly
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No-see-um
 
 

 

Butterflies/Moths

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Clothes moths
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Indian meal moths
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Tomato Hornworm
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Tiger swallowtail
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Monarch butterfly
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Pipevine swallowtail
 

 

True Bugs

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Cinch bug
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Brown Marmorated Stink Bug
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Woolly aphids
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Aphids
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Boxelder bugs
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Leaf-footed bug
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Kissing bug, Assassin bug
 
 

 

Additional Home Pests

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Exotic roaches in CA
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Oriental cockroach
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American cockroach
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Lice
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Bedbug
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Termites
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Silverfish
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Fleas
 

 

More Insects

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Beneficial insects
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Jerusalem cricket, Potato bug, Niño de la tierra
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Praying mantids
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Psocids
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Earwig
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Urban Myths
 

 

Other Non-insects

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House centipede
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Springtails, Collembola
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Sowbug, pillbug, roly poly
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Scorpions
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Camel spider, sun scorpion
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Lawn shrimp
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Earthworms