Cataulacus tardus

Cataulacus tardus

Cataulacus tardus is a medium-sized arboreal ant native to the rainforests of Central and West Africa. Workers measure 5.4-6.8mm with a distinctive stocky build, long propodeal spines, and smooth dorsal surfaces lacking hairs. They belong to the huberi species group and were previously known as Cataulacus tardus before being synonymized. These ants are canopy dwellers, nesting high in the branches of secondary forest trees where they forage among the foliage. The most remarkable feature of this species is its ability to glide, when workers fall or deliberately detach from a tree, they can direct their freefall to glide back and land on the same tree trunk, a behavior shared with other members of the tribe Crematogastrini. This makes them one of the few ants with genuine aerial maneuvering capabilities.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Rainforests of Central Africa (Democratic Republic of Congo, Congo, Gabon, Guinea, Cameroon, Ghana, Kenya). They nest in the canopy of secondary forest trees, typically found high in tree crowns ^[1][2].
• Colony Type: Colony structure is not well documented. Cataulacus species typically form moderate-sized colonies in arboreal nests. Based on genus patterns, likely monogyne (single queen) but this requires confirmation.
• Size & Growth:
  • Queen: Not specifically documented in available literature, estimated based on worker size and genus patterns
  • Worker: 5.4-6.8mm
  • Colony: Unknown, likely moderate-sized colonies typical of the genus
  • Growth: Unknown, likely moderate growth rate
  • Development: Unconfirmed, no direct development data available for this species (Development timeline has not been studied. Based on similar tropical Myrmicinae, expect 4-8 weeks at optimal temperature.)
• Antkeeping:
  • Temperature: Keep warm, around 24-28°C. As a tropical rainforest species from Central Africa, they need consistently warm conditions. A gentle gradient allowing them to move between warmer and cooler areas is ideal.
  • Humidity: High humidity is essential, these are canopy ants from humid tropical forests. Keep the nest area at 70-80% humidity with good ventilation to prevent mold while maintaining moisture.
  • Diapause: No, as a tropical species, they do not require hibernation or winter dormancy. Maintain consistent temperatures year-round.
  • Nesting: Arboreal setup is critical. These ants naturally nest in tree branches and hollows. In captivity, they do well in vertical formicariums, acrylic nests with multiple chambers, or naturalistic setups with branches and cork bark. They need climbing structures and vertical space. Avoid ground-based test tube setups, they prefer to stay elevated.
• Behavior: These ants are relatively docile and non-aggressive. In the wild, they show subordinate behavior at food baits, avoiding conflict with more dominant species. Workers are active foragers that patrol tree branches and foliage. They are not known to sting aggressively, and their stingers are small. The most notable behavior is their gliding ability, if a worker falls from the nest tree, it can direct its fall to land back on the trunk. This means they are excellent climbers and will attempt to escape if given the opportunity. Escape prevention should focus on vertical barriers and tight-fitting lids.
• Common Issues: tropical humidity requirements mean mold can be a problem if ventilation is poor, balance is critical, arboreal nature means they need vertical space and climbing structures, ground-based nests will stress them, gliding ability and strong climbing means escape prevention must be excellent despite their larger size, limited availability in the antkeeping hobby means established care protocols are rare, wild-caught colonies may have parasites or diseases that are difficult to treat in captivity

Natural History and Unique Behaviors

Cataulacus tardus is one of the more fascinating ants you can keep due to its unique gliding ability. Research by Yanoviak and colleagues (2005,2007,2008) documented how these canopy ants can direct their freefall when they fall or deliberately detach from a tree. Unlike other insects that simply fall, these ants can maneuver mid-air to glide back and land on the same tree trunk. This behavior helps them survive in the high canopy where falling from the nest could mean certain death. In the wild, they nest in the upper branches of secondary forest trees and forage among the canopy foliage. They are subordinate at food baits, meaning they will retreat from conflicts with more dominant ant species rather than fight. This peaceful temperament carries over to captivity, they are not aggressive and pose minimal threat to keepers. ^[1]

Housing and Nest Setup

Because Cataulacus tardus is strictly arboreal, your housing setup must reflect their natural tree-dwelling lifestyle. These ants should not be kept in horizontal test tube setups, they will be stressed and may not thrive. Instead, use a vertical formicarium with multiple chambers, or create a naturalistic arboreal setup with cork bark, branches, and other climbing structures. Acrylic nests with tight chambers work well, as do custom-built vertical setups. The key is providing vertical space with multiple chambers at different heights. Include materials they can grip, cork bark strips, twigs, or artificial climbing surfaces. The outworld should also be vertical or include plenty of climbing opportunities. Keep the nest area humid but ensure good air circulation to prevent mold.

Temperature and Humidity

As a tropical species from Central African rainforests, Cataulacus tardus needs warm and humid conditions year-round. Maintain temperatures between 24-28°C, with a slight gradient allowing workers to move between warmer and cooler areas if they choose. Room temperature may be sufficient if your home stays in this range, but a gentle heat source on one side of the nest can help maintain consistency. Humidity should be kept high, aim for 70-80% relative humidity in the nest area. This can be achieved by including a water reservoir or moist chamber in the setup. However, ventilation is equally important to prevent mold growth. Balance moisture with airflow. Unlike temperate species, they do not need any cooling period or diapause, maintain consistent tropical conditions throughout the year.

Feeding and Diet

In the wild, Cataulacus tardus forages among the canopy for honeydew, small insects, and other arthropods. In captivity, they should be offered a varied diet including sugar sources (honey water, sugar water) and protein (small insects like fruit flies, small crickets, mealworms). As subordinate ants in the wild, they are likely not aggressive hunters and may prefer scavenging or collecting honeydew. Offer protein foods 2-3 times per week and keep a sugar source available at all times. Remove uneaten prey after 24-48 hours to prevent mold. These ants are foragers rather than hunters, so smaller, slower-moving prey items may be accepted more readily than fast-moving insects.

Handling and Temperament

Cataulacus tardus is one of the more docile ant species you can keep. They are not aggressive and their small stingers pose minimal threat to humans. Workers are active and alert, constantly patrolling their territory, but they will flee rather than fight when threatened. This makes them a good choice if you want to observe interesting behaviors without worrying about painful stings. However, do not mistake their docility for sluggishness, they are quick movers and excellent climbers. They will explore every gap and seam in their enclosure. Excellent escape prevention is essential, not because they are aggressive, but because they are skilled climbers and will find any opening. Check lids and connections regularly.

Frequently Asked Questions

References