Camponotus nearcticus

Camponotus nearcticus - "Smaller Carpenter Ant"

Camponotus nearcticus is a small carpenter ant native across much of North America, from southern Canada south to Florida and west to British Columbia, Washington, Nevada, Utah, and California ^[1][2]. Workers measure 3.5-7.5mm and are typically brownish-black to black, though some specimens may have reddish-black heads and alitrunk ^[2]. The majors can be identified by their shiny gaster, dull mandible surface, lack of erect hairs on the sides of the head and cheeks, and their convex propodeum [AntWiki]. This species belongs to the subgenus Myrmentoma, a group of smaller arboreal carpenter ants ^[3].

What makes C. nearcticus interesting is its arboreal lifestyle, unlike many carpenter ants that nest in wood on the ground, this species specifically nests in dead twigs and branches in trees, including oak galls, hollow stems, and even the woodwork of buildings ^[2][4]. They are a timid species that hesitates to rescue brood when disturbed, and they tend coccids and aphids for honeydew [AntWiki]. Colonies are relatively small compared to other carpenter ants, typically containing less than a hundred to several hundred workers, though colonies of over 1000 have been recorded ^[2][4].

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Native to North America, found from Quebec and Ontario south to Florida and west to British Columbia, Washington, Nevada, Utah, and California ^[1][AntWiki]. Inhabits prairies, woodlands, and riparian areas, ranging from deciduous forests and oak habitats up to pinyon-juniper and ponderosa pine forests at elevations of 1490-1700m [AntWiki]. Also found in oak savanna and dry-mesic prairies ^[1].
• Colony Type: Monogyne (single-queen) colonies. All nests examined contained a single gyne (queen) [AntWiki]. Queenless worker reproduction has been documented in this species ^[5].
• Size & Growth:
  • Queen: ~8-10mm, inferred from Camponotus genus patterns for Myrmentoma subgenus
  • Worker: 3.5-7.5mm ^[2][1]
  • Colony: Up to approximately 1100 workers (one recorded colony had 1138 individuals including queen) ^[4]
  • Growth: Moderate
  • Development: 6-8 weeks based on typical Camponotus development at warm temperatures (Development data based on genus-level patterns, direct measurements unavailable for this species)
• Antkeeping:
  • Temperature: Keep at room temperature (20-24°C). They tolerate a range from roughly 18-26°C and do well in typical indoor conditions.
  • Humidity: Moderate humidity. As an arboreal species that nests in tree branches, they prefer slightly more humid conditions than ground-nesting carpenter ants but not saturated. Provide a humidity gradient with one moist area and mostly dry chambers.
  • Diapause: Yes. This is a temperate species that benefits from a winter rest period. Alates have been found in nests from March to October, suggesting reproductives may overwinter ^[1]. Keep at 10-15°C for 2-3 months during winter.
  • Nesting: Arboreal nesting preferences. In captivity, they do well in Y-tong (AAC) nests, wooden formicaria, or setups with narrow chambers that mimic their natural twig-nesting behavior. Provide dead branches or cork bark as nesting material. They also accept test tubes but may prefer more vertical, wood-like structures.
• Behavior: Timid and non-aggressive. This species hesitates to rescue brood when disturbed and avoids confrontation [AntWiki]. Workers are moderate foragers that search through leaf litter, on logs, tree trunks, and foliage ^[1]. They are not particularly escape-prone compared to some tiny ants, but standard barriers are still recommended. They tend coccids and aphids for honeydew and scavenge dead insects. As a house-infesting species, they may explore indoor spaces but colonies remain relatively small ^[2].
• Common Issues: colonies stay relatively small, this is not a rapid grower like some Camponotus species, timid behavior means they may abandon brood if disturbed too often during founding, arboreal nesting means they need appropriate vertical space and wood-like nesting material, may nest in building woodwork if given access, similar to other carpenter ants, slow colony growth means beginners may lose interest and overfeed, causing mold issues

Housing and Nest Setup

Camponotus nearcticus is an arboreal species that naturally nests in dead twigs, branches, and hollow stems in trees ^[2][4]. In captivity, they do best in setups that mimic this arboreal lifestyle. Y-tong (AAC) nests work well, as do wooden formicaria or acrylic nests with narrow chambers. You can also provide cork bark or small dead branches as nesting material in a naturalistic setup. Test tubes can work for founding colonies, but consider moving them to a more arboreal-style nest once the colony reaches 20-30 workers. They prefer chambers that are somewhat vertical rather than wide and flat, reflecting their natural twig-nesting behavior. Place the nest in a location with moderate light and avoid excessive vibrations, as this is a timid species that may abandon brood if disturbed [AntWiki].

Feeding and Diet

Like most carpenter ants, C. nearcticus is omnivorous with a preference for protein. Workers tend coccids and aphids in the wild, so they readily accept sugar sources like honey water or sugar water [AntWiki]. Their diet consists mostly of insects, offer small prey items like fruit flies, small crickets, mealworms, or other appropriately-sized insects twice weekly ^[6]. They also scavenge dead insects, so occasional protein-rich offerings are appreciated. Keep a constant supply of sugar water available, especially for established colonies. Avoid overfeeding, as excess food can mold and cause problems in small colonies. Remove uneaten prey after 24-48 hours.

Temperature and Seasonal Care

This species does well at standard room temperature (20-24°C) and doesn't require additional heating in most homes. They are adaptable and can tolerate temperatures ranging from roughly 18-26°C. As a temperate North American species, they benefit from a winter diapause period. Reduce temperatures to 10-15°C for 2-3 months during winter (typically November through February in the Northern Hemisphere). During this time, reduce feeding to once every two weeks or skip feeding entirely. The colony will become less active but should not be frozen, a basement or refrigerator (not freezer) works well for overwintering. Return to normal temperatures gradually in spring to trigger renewed activity and growth. ^[1]

Colony Development and Growth

C. nearcticus colonies grow moderately compared to some faster-growing Camponotus species. A typical mature colony contains several hundred workers, one recorded colony had 1138 individuals including a queen, 279 workers, 302 worker pupae, 463 larvae, and 93 eggs ^[4]. Colonies are monogyne, with a single queen that can live for many years. Queenless worker reproduction has been documented, meaning workers can lay eggs if the queen dies, though these eggs typically develop into males ^[5]. Development from egg to worker takes an estimated 6-8 weeks at warm temperatures, based on typical Camponotus patterns. The first workers (nanitics) will be smaller than mature workers. Major workers (soldiers) develop as the colony grows, typically appearing when the colony reaches 50-100 workers.

Behavior and Temperament

This is a timid, non-aggressive species that hesitates to rescue brood when its nest is disturbed [AntWiki]. Workers are relatively calm and not particularly territorial or defensive. They go about their business quietly, foraging through leaf litter, on logs, tree trunks, and foliage ^[1]. They are not major stingers, while all Camponotus ants have the ability to bite, this species is too small to cause meaningful discomfort to humans. They may enter homes and nest in wooden structures, making them occasional house-infesting ants, but damage is typically minimal compared to larger carpenter ants like C. pennsylvanicus ^[2]. Workers communicate through chemical trails and will establish foraging routes to food sources.

Frequently Asked Questions