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Insects & Arthropods of California

The insects & arthropods most often spotted in California, ranked by recent research-grade observations.

948,446
recent observations
50
species listed
50
insects & arthropods

Naturalists have logged 948,446 research-grade observations across the 50 most-recorded species in California. The most frequently seen is the Western Honey Bee, with 99,936 recorded sightings.

Most-observed insects & arthropods in California

Western Honey Bee
Apis mellifera
99,936 observations
Monarch
Danaus plexippus
67,544 observations
Seven-spotted Lady Beetle
Coccinella septempunctata
29,379 observations
Gray Buckeye
Junonia grisea
28,016 observations · iNaturalist
Convergent Lady Beetle
Hippodamia convergens
27,998 observations
Fiery Skipper
Hylephila phyleus
27,763 observations · iNaturalist
Arizona Mantis
Stagmomantis limbata
27,641 observations · iNaturalist
White-lined Sphinx
Hyles lineata
26,097 observations · iNaturalist
Painted Lady
Vanessa cardui
25,404 observations
Asian Lady Beetle
Harmonia axyridis
24,258 observations
Yellow-faced Bumble Bee
Bombus vosnesenskii
22,415 observations · iNaturalist
Gray Bird Grasshopper
Schistocerca nitens
22,019 observations · iNaturalist
Gulf Fritillary
Dione vanillae
21,859 observations · iNaturalist
Small White
Pieris rapae
21,529 observations
Noble False Widow
Steatoda nobilis
20,098 observations · iNaturalist
Anise Swallowtail
Papilio zelicaon
19,238 observations
Variable Checkerspot
Euphydryas chalcedona
18,945 observations · iNaturalist
Mourning Cloak
Nymphalis antiopa
18,127 observations
Western Tiger Swallowtail
Papilio rutulus
17,575 observations
Gray Hairstreak
Strymon melinus
17,163 observations
Umber Skipper
Lon melane
17,067 observations · iNaturalist
Vivid Dancer
Argia vivida
15,609 observations · iNaturalist
Acmon Blue
Icaricia acmon
15,203 observations · iNaturalist
California Gall Wasp
Andricus quercuscalifornicus
14,665 observations · iNaturalist
Pipevine Swallowtail
Battus philenor
14,634 observations
California Sister
Adelpha californica
14,457 observations
Bold Jumping Spider
Phidippus audax
14,425 observations
Flame Skimmer
Libellula saturata
13,572 observations · iNaturalist
Western Black Widow
Latrodectus hesperus
13,337 observations
Figeater Beetle
Cotinis mutabilis
13,097 observations · iNaturalist
Variegated Meadowhawk
Sympetrum corruptum
13,029 observations · iNaturalist
Black-tailed Bumble Bee
Bombus melanopygus
12,514 observations · iNaturalist
Red Admiral
Vanessa atalanta
12,330 observations
Marine Blue
Leptotes marina
12,157 observations · iNaturalist
Brown Widow
Latrodectus geometricus
11,818 observations · iNaturalist
Dotted Paropsine Leaf Beetle
Paropsis atomaria
11,527 observations · iNaturalist
West Coast Lady
Vanessa annabella
11,307 observations · iNaturalist
Valley Carpenter Bee
Xylocopa sonorina
11,276 observations · iNaturalist
Lorquin's Admiral
Limenitis lorquini
11,214 observations
California Tortoiseshell
Nymphalis californica
11,024 observations
Argentine Ant
Linepithema humile
10,924 observations
European Mantis
Mantis religiosa
10,744 observations
Spotless Lady Beetle
Cycloneda sanguinea
10,741 observations · iNaturalist
Western Yellowjacket
Vespula pensylvanica
10,188 observations · iNaturalist
Spotted Cucumber Beetle
Diabrotica undecimpunctata
10,119 observations
Mylitta Crescent
Phyciodes mylitta
10,001 observations · iNaturalist
Johnson's Jumping Spider
Phidippus johnsoni
9,642 observations · iNaturalist
Harlequin Bug
Murgantia histrionica
9,640 observations · iNaturalist
Pallid-winged Grasshopper
Trimerotropis pallidipennis
9,619 observations
Common Ringlet
Coenonympha california
9,562 observations

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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