European Earwig
( Forficula auricularia )


2013-0504-EB060704-DER00707-Forficula_auricularia[1159h12s,F,A,plant-foliage]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Forficula auricularia
(Linnaeus ,1758 )
Common Name:European Earwig
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Polyneoptera
Order:Dermaptera
Suborder:Eudermaptera
Family:Forficulidae
Subfamily:Forficulinae
Genus:Forficula
Taxon Code:DER00707
ITIS/TSN:186036

LOCATION DETAILS
Location Name
Black Diamond Mines Regional Preserve, Black Diamond Mines Regional Preserve, Black Diamond Mines Regional Preserve, 5175 Somersville Rd., Antioch
County:Contra Costa County
ECI Site#:CAEB060700
Open Space Location:Black Diamond Mines Regional Preserve

RECOGNITION
Description
Male: Cerci (pincers) 4-8 mm. Female: Cerci 3 mm; tegmina 2 mm. Male cerci vary from about half as long to longer than the abdomen, broadened basally, with crenulate teeth basally and on beginning of curvature of inner margin. Antennae: 12 to 15 segments. Color: Adults are rich reddish-brown, with wing covers and legs dull yellow brown, and the wings completely developed. Large forceps of male distinguis this species from others in North American.
Sexes
Males possess cerci much larger than females.
Wingspan
About 10-12 mm. However, wings are folded beneath the tegmina (leathery forewings) and are rarely visible. These earwigs do fly.
Body Length
12-22 mm.
Colors
Base color: dark brown, almost black, Color1: dark brown Color2: light brown

BIOLOGY
Food
Omnivorous, and both beneficial and pestiferous. This insect will eat pests on plants as well as the plants themselves.
Distribution
Cosmopolitan, native to western Palearctic; widely though spottily distributed across NA; introduced from Europe around 1910.
Development
Females lay clutches of eggs which she tends to keep clean and safe. Nymphs are miniature, undeveloped versions of the parents, with wings developing gradually on the outside of the body with each molt, the number of segments in the antennae also increasing with each molt, and the cerci develop from thin rods into the characteristic cerci of the adults. The female continues to look after early stage hatchlings.

CREDITS
Photographer
Eddie Dunbar
Insect Sciences Museum of California

References
Species Forficula auricularia - European Earwig. (http://bugguide.net/node/view/23281). Accessed March 12, 2016. .
ITIS.


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