Scientific illustration of Odontomachus davidsoni ant - showing key identification features including head, thorax, and gaster.

Odontomachus davidsoni

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Odontomachus davidsoni
Tribe
Ponerini
Subfamily
Ponerinae
Author
Hoenle <i>et al.</i>, 2020
Distribution
Found in 1 countries
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Introduction

Odontomachus davidsoni is a large trap-jaw ant from the lowland forests of coastal Ecuador. Workers are slender and have a total length over 17 mm, with a ferruginous to reddish-brown body, deep striations on the head, and mandibles with over 15 preapical teeth . Queens are larger than workers and have three ocelli . This species is endemic to the Chocó-Darién bioregion in Esmeraldas Province, Ecuador, and is known only from Reserva Río Canandé and neighboring Tesoro Escondido reserve . This ant is primarily nocturnal and arboreal, foraging in the canopy on lianas and tree trunks. Workers are ambush predators that sit motionless on leaves with mandibles open, snapping shut on prey . In captivity, they readily accept sugar water and small insects, showing strong nighttime activity patterns .

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Status by country, from Kass et al. 2022 & Wong et al. 2023

Native Invasive Introduced (indoor) Intercepted Unknown
Data Sources
Year Range 2000 - 2026

Quick Summary

  • Difficulty: Medium
  • Origin & Habitat: Endemic to lowland tropical forests in the Chocó-Darién bioregion of coastal Ecuador, specifically Reserva Río Canandé and Tesoro Escondido reserve at approximately 330 m elevation [2][3].
  • Colony Type: Single-queen colonies (monogyne). One documented nest contained one dealate queen and 18 workers with brood in all stages [2].
  • Size & Growth:
    • Queen: size data unavailable
    • Worker: 17 mm [1]
    • Colony: Up to 18 workers [2]
    • Growth: Moderate
    • Development: Unconfirmed, but estimated 6-10 weeks based on related Odontomachus species [2] (Development time is not directly documented, inferred from tropical trap-jaw ant patterns.)
  • Antkeeping:
    • Temperature: Keep nest area at 24-28°C, as this is a tropical species from lowland Ecuador [2].
    • Humidity: Keep nest substrate consistently moist but not waterlogged, based on the humid Chocó-Darién habitat [2].
    • Diapause: No, this tropical species does not require hibernation [2].
    • Nesting: Prefer nests with pre-existing cavities, such as Y-tong, plaster, or 3D-printed nests with vertical space for arboreal foraging [2][3].
  • Behavior: Nocturnal and ambush predators, workers sit still with mandibles open to catch prey. Not aggressive toward humans but have powerful trap-jaw mandibles that can pinch. Escape risk is moderate due to size and climbing ability [2][3].
  • Common Issues: need consistent warmth between 24-28°C to thrive, small colony sizes observed in wild, requiring patience for growth, prefer small prey under 2 cm and may reject larger insects, no recruitment behavior, so place food where foragers can find it, arboreal nature requires vertical climbing space in captivity

Housing and Nest Setup

Odontomachus davidsoni naturally nests in pre-existing cavities within fallen branches in the forest canopy. In captivity, use Y-tong, plaster, or 3D-printed nests with chambers sized for large ants. Provide vertical space for climbing, as they are arboreal foragers. Start founding colonies in a test tube setup, but upgrade as the colony grows. Keep the nest humid with good ventilation to prevent mold [2][3].

Feeding and Diet

Workers are ambush predators that accept small insects like flies, crickets, and termites under 2 cm. They reject larger prey. Sugar water should be available at all times, as they readily drink it. Feed small insects 2-3 times per week. Do not rely on recruitment, place food where foragers can discover it [2].

Temperature and Humidity

Keep temperatures at 24-28°C year-round, using a heating cable on one side of the nest for a gentle gradient. Avoid temperatures below 22°C. Maintain humidity by keeping the nest substrate moist but not waterlogged, reflecting their natural humid habitat [2].

Behavior and Activity Patterns

This species is primarily nocturnal, with foraging activity between 8 pm and 11 pm. Workers use trap-jaw mandibles for predation and defense, they are not aggressive but can pinch if handled. Escape risk is moderate due to their size and ability to climb smooth surfaces [2][3].

Colony Development and Growth

Wild colonies are small, with one nest containing 18 workers and a queen. Growth is moderate, and colonies may take time to mature. Founding behavior is unconfirmed, but queens likely raise first workers alone [2].

Seasonal Care

As a tropical species, no diapause is needed. Maintain consistent temperatures and humidity year-round. Nuptial flights occur in warmer months, based on alate collections in February to June [2].

Frequently Asked Questions

How long does it take for Odontomachus davidsoni to produce first workers?

The exact timeline is unconfirmed, but based on related species, expect 6-10 weeks from egg to worker at optimal temperatures. Be patient, as colonies grow slowly [2].

What do Odontomachus davidsoni ants eat?

They accept small insects under 2 cm, such as flies and crickets, and readily drink sugar water. Feed protein 2-3 times per week and keep sugar water available [2].

Are Odontomachus davidsoni good for beginners?

This species is rated Medium difficulty due to specific temperature and humidity needs. Beginners should be prepared for tropical care requirements [2].

How big do Odontomachus davidsoni colonies get?

Based on one observed nest, colonies reach up to 18 workers. Larger sizes are possible but unconfirmed [2].

Can I keep multiple Odontomachus davidsoni queens together?

This species is monogyne, with single-queen colonies. Combining queens is not recommended, as it has not been studied [2].

Do Odontomachus davidsoni need hibernation?

No, as a tropical species from Ecuador, they do not require diapause. Maintain consistent warm temperatures year-round [2].

What temperature should I keep Odontomachus davidsoni at?

Keep nest temperatures at 24-28°C. Use a heating cable to create a gradient if needed [2].

When should I move my colony to a formicarium?

Start with a test tube for founding. Move to a larger nest when the colony has 15-20 workers or shows crowding. Use Y-tong or plaster nests with vertical space [2].

Why is my Odontomachus davidsoni colony not growing?

This species naturally forms small colonies. Ensure temperatures are warm, humidity is high, and prey is appropriately sized. Verify the queen is alive and laying eggs [2].

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References

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This caresheet is licensed under CC BY-SA 4.0 .