Carpenter-ant
Guides
Camponotus
Carpenter ants, Typical sugar ants and allies
Camponotus is a large and diverse genus of ants commonly known as carpenter ants, comprising approximately 1,000 described species worldwide. Members are characterized by their habit of excavating wood to create nest galleries, though they do not consume wood as food. The genus exhibits considerable size variation among workers, with major workers often more than twice the size of minors. Camponotus ants are eusocial, forming long-lived colonies with cooperative brood care, overlapping generations, and reproductive division of labor. They occupy diverse ecological roles including predation, scavenging, and mutualistic relationships with honeydew-producing insects.
Camponotus absquatulator
Camponotus absquatulator is a species of carpenter ant native to California, Nevada, and Baja California. It was formally separated from the Camponotus festinatus species complex in 2006 by myrmecologist Roy Snelling. As a member of the genus Camponotus, it is a large-bodied ant that excavates wood for nesting. The specific epithet "absquatulator" is derived from a humorous pseudo-Latin verb meaning "to abscond" or "to leave hurriedly," reflecting the species' elusive nature or perhaps the taxonomic confusion that preceded its formal description.
Camponotus acutirostris
Camponotus acutirostris is a species of carpenter ant described by Wheeler in 1910. The species is native to the southwestern United States and adjacent regions of northern Mexico, occurring in arid and semi-arid environments. As a member of the genus Camponotus, it nests in wood and exhibits the typical carpenter ant biology of excavating galleries rather than consuming wood as a food source.
Camponotus americanus
American Carpenter Ant
Camponotus americanus is a North American carpenter ant species characterized by its relatively large size among congeners. Workers measure 7–10 mm in length. The species is primarily ground-nesting, though it exhibits flexibility in nest site selection. It belongs to the diverse genus Camponotus, which contains over 1,000 species globally and is notable for its wood-excavating habits and ecological roles as decomposers.
Camponotus atriceps
Tropical Carpenter Ant
Camponotus atriceps is a large carpenter ant species endemic to the Americas, ranging from the southern United States through Central and South America. In the Amazon region, it has been documented attacking colonies of stingless bees (Melipona flavolineata and M. fasciculata), destroying hives and consuming brood when food resources are scarce. The species occupies diverse moist forested habitats from sea level to 2,290 meters elevation. Research in Brazil has demonstrated that empty hive 'trap boxes' can attract these ants, providing a non-chemical control method for managed bee colonies. Workers of this species have been shown to bioaccumulate heavy metals, indicating potential use as environmental contamination indicators.
Camponotus bakeri
Baker's Carpenter Ant
Camponotus bakeri is a species of carpenter ant endemic to the Channel Islands of California, with additional populations in mainland California and Arizona. It nests in dead wood, including decaying stumps, fallen branches, and hollow trees. Like other members of the genus Camponotus, it excavates galleries rather than consuming wood for nutrition. The species is named in honor of an individual with the surname Baker, following standard entomological naming conventions of the early 1900s.
Camponotus caryae (Fitch, 1855)
Walnut Carpenter Ant
Camponotus caryae is a species of carpenter ant in the genus Camponotus, commonly known as the Walnut Carpenter Ant. It is native to eastern North America, with records from the eastern United States and eastern Canada, and has also been reported from Mexico (Nuevo León and Chihuahua). There are unconfirmed reports of its presence in parts of the western United States, Spain, Italy, and Bulgaria. Like other carpenter ants, it nests in wood and is associated with hickory and walnut trees.
Camponotus castaneus
Chestnut Carpenter Ant, Red Hazelnut Carpenter Ant, Reddish Carpenter Ant
Camponotus castaneus is a medium-sized carpenter ant native to eastern North America. Workers exhibit pronounced size polymorphism, with minor workers measuring 8-10 mm and major workers reaching 10-14 mm; queens are substantially larger at 18-20 mm. The species is distinguished by its orangish-red coloration, smooth thorax and abdomen, and single petiolar node. Colonies nest in rotting wood and undergo an early diapause beginning in fall, often ceasing foraging before other temperate ant species.
Camponotus chromaiodes
ferruginous carpenter ant, red carpenter ant
Camponotus chromaiodes, commonly known as the ferruginous or red carpenter ant, is a species of carpenter ant native to the eastern United States with records extending to Nebraska, Kansas, and possibly California. Workers of this species have been observed removing honeydew droplets from spotted lanternfly nymphs, suggesting potential for developing mutualistic relationships with honeydew-producing insects. Like other carpenter ants, it excavates galleries in wood for colony housing rather than consuming wood for nutrition.
Camponotus clarithorax
Carpenter ant
Camponotus clarithorax is a species of carpenter ant in the subgenus Camponotus, native to western North America. It was described by William Morton Creighton in 1950. The species occurs in California, Oregon, and the Baja California Peninsula, with possible records from the eastern United States. Like other carpenter ants, it nests in wood and exhibits the polymorphic worker caste system typical of the genus.
Camponotus conspicuus inaequalis
Camponotus conspicuus inaequalis is a subspecies of carpenter ant in the genus Camponotus, family Formicidae. It is recorded from the Galápagos Islands. As a member of the subgenus Myrmepomis, it likely shares traits with related taxa including arboreal nesting habits and distinctive pubescence, though specific documentation for this subspecies is limited.
Camponotus decipiens
Deceptive Carpenter Ant
Camponotus decipiens is a species of carpenter ant native to eastern North America and parts of Mexico. Workers range from 3 to 7.5 mm in length and are characterized by a black gaster. Colonies are typically small, often containing fewer than 100 workers but occasionally reaching several hundred. The specific epithet 'decipiens' derives from Latin, meaning 'deceiving, cheating, or trapping'.
Camponotus discolor
Bicolored Arboreal Carpenter Ant
Camponotus discolor is a carpenter ant species native to the eastern and central United States and adjacent Mexico. It exhibits the typical caste polymorphism of the genus, with distinct queen, worker, and male forms. The species has been studied for its genetic basis of caste differentiation, revealing that novel and highly modified genes play a major role in worker development.
Camponotus essigi
Essig's Carpenter Ant
Camponotus essigi is a carpenter ant species native to the western United States and possibly Coahuila, Mexico. It belongs to the large genus Camponotus, which comprises over 1,000 species worldwide. A mislabeled specimen reportedly from Trinidad and Tobago was determined to be a location error by R. R. Snelling in 2000, confirming the species' restricted western North American distribution. Like other carpenter ants, it nests in wood and exhibits the polymorphic worker caste system typical of the genus.
Camponotus floridanus
Florida Carpenter Ant
Camponotus floridanus, the Florida carpenter ant, is a large, conspicuous ant species native to the southeastern United States. It is notable for its striking bicolored appearance—reddish-orange head and mesosoma contrasting with a black gaster—and its highly aggressive defensive behavior. The species exhibits pronounced worker polymorphism with distinct minor and major castes, and maintains an obligate mutualism with the endosymbiotic bacterium Blochmannia floridanus. Colonies are fast-growing and can reach thousands of individuals, with unique behaviors including surgical amputation of injured nestmate limbs to prevent infection.
Camponotus fragilis
Camponotus fragilis is a carpenter ant species endemic to the southwestern United States and northern Mexico. First described by Theodore Pergande in 1893, it was synonymized and later revived by Roy Snelling in 2006. The species has been studied for its gut bacterial communities, which show compartmentalization across different gut sections and variation between laboratory-raised and field-collected colonies.
Camponotus hyatti
Camponotus hyatti is a species of carpenter ant in the family Formicidae. It is native to the Pacific coast of western North America, ranging from Oregon to the Baja California Peninsula. The species is distinguished by specific morphological features including five-toothed mandibles and a smooth, shiny clypeus. It nests in woody plants including sagebrush, Yucca, manzanita, and oak.
Camponotus laevigatus
Hairless Smooth Carpenter Ant
Camponotus laevigatus is a California endemic carpenter ant species that nests in dead oak branches, particularly of Quercus wislizeni (interior live oak). It maintains an obligate mutualism with the bacterial endosymbiont Blochmaniella, with which it shows strong codiversification patterns. Population genetic studies reveal three phylogeographic clusters with the Central Valley acting as a significant barrier to gene flow, and Pleistocene climatic cycles have shaped its current distribution.
Camponotus laevissimus
giant carpenter ant, Hairy Smooth Carpenter Ant
Camponotus laevissimus is a large carpenter ant native to western North America, ranging from western Canada through the United States to Mexico. Workers are among the largest in the genus, measuring 7–13 mm. The species is notable for its distinctive shiny black coloration with a blue iridescent tint and dense covering of short white hairs. It is primarily diurnal and specializes in nesting within redwood trees (Sequoia sempervirens), hollowing out cavities rather than consuming the wood. A documented predator of western spruce budworm pupae, this species plays a role in forest pest dynamics. Formerly known as C. laevigatus, it was reclassified by Mackay in 2019.
carpenter-antredwood-specialistdiurnalforest-pest-predatorwestern-North-AmericaCamponotusFormicidaeHymenopterablue-iridescencewhite-pubescencewestern-spruce-budworm-predatorSequoia-sempervirens-associatemoist-wood-nestinglarge-ant-speciespolymorphic-workersclaustral-colony-foundationhoneydew-tendingstructural-pestMackay-2019formerly-C.-laevigatusCamponotus microps
Camponotus microps is a species of carpenter ant described by Roy Snelling in 2006. It was separated from the Camponotus festinatus species complex based on distinct morphological characteristics. The species is native to the southwestern United States and north-central Mexico.
Camponotus mina
Camponotus mina is a species of carpenter ant in the genus Camponotus, native to southwestern North America and northern Mexico. It belongs to the diverse carpenter ant genus, which includes species known for nesting in wood and exhibiting polymorphic worker castes. The species was described by Auguste Forel in 1879.
Camponotus modoc
Western Carpenter Ant, Western Black Carpenter Ant
Camponotus modoc, the western carpenter ant, is a large black ant species native to western North America. Workers exhibit polymorphism, ranging from 7 to 13 mm in length, with dark red legs contrasting against a black body. The species constructs nests in dead wood, including forest logs and human structures, and is known for its mutualistic associations with aphids, particularly Cinara occidentalis on white fir. Research demonstrates trail fidelity and colony recognition abilities, with workers returning to specific aphid colonies even after displacement.
carpenter-antwestern-north-americaaphid-mutualismstructural-pestpolymorphismtrail-fidelitychemical-ecologygiant-sequoia-forestforest-ecologyurban-pestCamponotiniFormicinaeHymenopterainvasive-potentialnestmate-recognitionalarm-communicationforaging-ecologyconifer-forestwood-excavationsatellite-colonyCamponotus novaeboracensis
New York carpenter ant
Camponotus novaeboracensis, commonly known as the New York carpenter ant, is a species of large carpenter ant native to North America. It excavates galleries in dead or decaying wood to house colonies, but does not consume wood as a food source. The species is primarily nocturnal and plays a significant role in forest decomposition. Workers vary in size, with major workers reaching approximately 13–17 mm in length. The species is sometimes confused with other large black ants but can be distinguished by morphological features of the thorax and petiole.
Camponotus novogranadensis
Black Compact Carpenter Ant
Camponotus novogranadensis is a species of carpenter ant in the subgenus Myrmobrachys, known from South America. It is one of over 1,000 species in the genus Camponotus. The species has been documented in Colombia and across much of Brazil, with records from diverse habitats including tropical forests and disturbed areas. As a member of the compact carpenter ant group, it shares morphological traits with related species such as the invasive Camponotus planatus.
Camponotus ocreatus
Carpenter ant
Camponotus ocreatus is a species of carpenter ant in the genus Camponotus, first described by Emery in 1893. It is native to arid and semi-arid regions of northern Mexico and the southwestern United States. Like other members of the genus, it nests in wood and maintains colonies with polymorphic worker castes.
Camponotus pennsylvanicus
Eastern Black Carpenter Ant, Black Carpenter Ant
Camponotus pennsylvanicus, the Eastern Black Carpenter Ant, is a large, robust ant species native to eastern North America. Workers measure 3/8 to 1/2 inch in length and are uniformly dark brown to black. Unlike termites, this species excavates wood rather than consuming it, creating galleries in decaying stumps, fallen logs, and hollow trees for colony housing. The species is facultatively polydomous, with colonies sometimes occupying multiple nest sites connected by trails. C. pennsylvanicus is notable for its swimming ability, using forelegs to paddle and mid legs to row when encountering water hazards. The species employs chemical trail-laying for foraging recruitment and practices trophallaxis as a mechanism of social immunity, distributing antimicrobial substances among colony members. While primarily a forest species, it frequently becomes a household pest when satellite colonies establish in moisture-damaged structural wood.
Camponotus sansabeanus
Camponotus sansabeanus is a species of carpenter ant native to western North America and parts of the southern United States. It belongs to the large genus Camponotus, which comprises over 1,000 species worldwide. Like other carpenter ants, it excavates wood to create nest galleries rather than consuming wood as food. The species is found in diverse habitats ranging from arid western regions to more humid southeastern localities.
Camponotus sayi
Say's Carpenter Ant
Camponotus sayi is a species of carpenter ant in the family Formicidae. As a member of the large genus Camponotus, it shares the characteristic wood-excavating nesting behavior typical of carpenter ants. The species was described by Emery in 1893 and is known from observations primarily in North America. Like other Camponotus species, it likely establishes colonies in dead wood and may occasionally occur in human structures when suitable moisture conditions exist.
Camponotus schaefferi
Schaeffer's Carpenter Ant
Camponotus schaefferi is a species of carpenter ant in the genus Camponotus, described by Wheeler in 1909. It is native to the southwestern United States and possibly Venezuela. Like other carpenter ants, it excavates wood to create nest galleries rather than consuming wood for nutrition. The species belongs to the diverse subgenus Myrmobrachys, characterized by a relatively low and broad mesosoma.
Camponotus snellingi
Snelling's Carpenter Ant
Camponotus snellingi is a species of carpenter ant named in honor of the myrmecologist Roy R. Snelling. As a member of the genus Camponotus, it shares the characteristic wood-nesting behavior typical of carpenter ants, excavating galleries in dead or decaying wood rather than consuming it. The species was described by Barry Bolton in 1995. Like other Camponotus species, it exhibits polymorphic worker castes with distinct size classes.
Camponotus socius
Sandhill Carpenter Ant
A large carpenter ant native to the southeastern United States, well-adapted to sandy soils of xeric woodlands. Exhibits polymorphic worker castes with distinctive coloration including variegated gaster banding. Notable for ground-nesting behavior unusual among Camponotus species, constructing deep nests with satellite colonies. Activity is primarily crepuscular, with midday retreat during hot periods.
Camponotus subbarbatus
Bearded Carpenter Ant
Camponotus subbarbatus, commonly known as the bearded carpenter ant, is a species of carpenter ant native to eastern North America. It belongs to the large genus Camponotus, which comprises over 1,000 species worldwide. As a carpenter ant, it excavates wood to create nest galleries rather than consuming wood for nutrition. The species is distinguished by morphological features related to its 'bearded' appearance, though specific details of this trait are not well documented in the provided sources.
Camponotus ulcerosus
Camponotus ulcerosus is a species of carpenter ant in the genus Camponotus, described by Wheeler in 1910. It is native to the southwestern United States and Mexico. As a member of the carpenter ant group, it nests in wood and exhibits the typical colony structure of the genus with polymorphic workers. Beyond its geographic range and taxonomic placement, specific biological details remain poorly documented in published literature.
Camponotus vicinus
Bicolored Carpenter Ant
Camponotus vicinus is a large, conspicuous carpenter ant distributed across western North America from Alaska to Mexico and east to Texas and Manitoba. Unlike many carpenter ants that nest in wood, this species typically nests in soil under stones and other objects, though it also uses fallen, decomposing logs in higher elevation conifer forests. It is a prominent scavenger and predator in terrestrial ecosystems and is one of the most abundant ground-dwelling arthropods in California's higher elevation conifer forests. The species belongs to a genetically diverse species complex with cryptic diversity, including localized populations of conservation interest such as an undescribed species endemic to the Channel Islands.
Camponotus zonatus
Caribbean Banded Carpenter Ant
Camponotus zonatus is a species of carpenter ant in the genus Camponotus, first described by Emery in 1894. Originally described as a subspecies of Camponotus extensus, it is now recognized as a full species. The common name 'Caribbean Banded Carpenter Ant' reflects its geographic distribution in the Caribbean region. Like other members of the genus Camponotus, it nests in wood and exhibits the characteristic traits of carpenter ants, including polymorphic worker castes and colony nesting in wooden substrates.