Ants of Marin County
Based on species list from AntWeb.org
Western Carpenter Ant
Camponotus modoc or western carpenter ant is a black carpenter ant with dark red legs. Workers range in size from 7 to 13 millimetres (0.28 to 0.51 in).
Formica fusca
Formica fusca, a common black colored ant found in Europe, is a palaearctic ant with a range extending from Portugal in the west to Japan in the east and from Italy in the south to Fennoscandia in the north. F. fusca nests are usually found in rotten tree stumps or under stones in clearcut areas and along woodland borders and hedgerows.
Formica pacifica
Formica pacifica is an ant species occupying the Pacific coast of the United States and British Columbia, Canada.
Lasius alienus
Lasius alienus, is a species of ant in the subfamily Formicinae (family Formicidae). Workers have a length of about 2–4 mm, females are larger (7–9 mm).
Argentine Ant
The Argentine ant, Linepithema humile (formerly Iridomyrmex humilis), is a dark ant native to northern Argentina, Uruguay, Paraguay, and southern Brazil. It is an invasive species that has been established in many Mediterranean climate areas, inadvertently introduced by humans to many places, including South Africa, New Zealand, Japan, Easter Island, Australia, ...more ↓
Escamoles
Liometopum occidentale is a species of ants in the subfamily Dolichoderinae. Liometopum occidentale is often mistaken for carpenter ants (Camponotus spp.) by homeowners and pest management professionals. This mistaken identity is due to morphological and behavioral characteristics they share with carpenter ants; namely polymorphic workers, a smooth convex thoracic ...more ↓
Slave-making Ant
Polyergus breviceps is a species of ant which is endemic to the United States. It is a social parasite of other ants, namely of Formica gnava but also of Formica occulta and Formica argentea.Polyergus is an inquiline parasite, having lost its ability to take care of its young and themselves. "The workers do not forage for food, feed the young or the ...more ↓
Solenopsis molesta
Solenopsis molesta, also known as thief ants, get their names from their habit of nesting close to other ant nests, from which they steal food. They are also called grease ants because they are attracted to grease.
odorous house ant
Tapinoma sessile is a species of ant that goes by the common names odorous house ant, stink ant, and coconut ant. Their colonies are polydomous (consist of multiple nests) and have a characteristic dominance hierarchy system. Like many social insects, T. sessile employs complex foraging strategies, allocates food depending on environmental conditions, ...more ↓
pavement ant
The pavement ant, Tetramorium caespitum, is a common household pest. Its name comes from the fact that colonies usually make their homes in pavement. It is distinguished by one pair of spines on the back, two nodes on the petiole, and grooves on the head and thorax . The species is native to Europe, but was introduced to North America in the 18th century.
