Myrmica bactriana

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Tibetan Plateau region (Tibet/China, Nepal) at high altitudes 2800–3900 m in grasslands and subalpine meadows ^[1][2][3][4]
• Colony Type: Unknown – queens have not been described, so colony structure is unstudied
• Size & Growth:
  • Queen: Unknown – queens have not been scientifically described ^[1]
  • Worker: Estimated ~4–6 mm, inferred from the genus Myrmica ^[5]. No direct body size measurements exist.
  • Colony: Unknown – no colony size data available
  • Growth: Unknown
  • Development: Unknown – estimate 8–12 weeks based on typical Myrmica genus patterns at optimal temperature, but purely speculative (No direct development data exists for this species. Estimates are based on related Myrmica species from similar high-altitude habitats.)
• Antkeeping:
  • Temperature: Cool to cold – aim for 15–22 °C, reflecting high-altitude origin. Provide a temperature gradient for self-regulation. Avoid overheating ^[5].
  • Humidity: Moderate to high – they naturally inhabit damp subalpine meadows. Keep nest substrate consistently moist but not waterlogged. Provide a water tube for drinking ^[5].
  • Diapause: Yes – high-altitude species almost certainly require a winter dormancy period. Provide 3–4 months of cold conditions around 5–10 °C during winter. This is not confirmed by research but inferred from habitat ^[5].
  • Nesting: Likely prefers soil or rotting wood nests based on field observations: nesting under stones, in rotten wood, and under rotten wood ^[4]. Use a naturalistic setup with soil substrate or a Y-tong/plaster nest with moisture retention. Avoid acrylic nests.
• Behavior: Workers forage on plants, ground surfaces, under stones, and in decaying wood ^[4]. Like other Myrmica, they are probably moderately aggressive when disturbed and can sting. Escape risk is moderate due to small worker size (4–6 mm). They are active during warmer months in their native habitat and would be most active in captivity from spring to fall.
• Common Issues: queen unavailability – queens have never been scientifically described, making obtaining a founding queen nearly impossible, no development data – without known queen caste or colony structure, captive propagation is extremely difficult, high-altitude requirements – cool temperatures and proper diapause are challenging to provide year-round, escape prevention – small worker size means standard barriers may need reinforcement, slow colony growth – even if established, growth will likely be slow due to high-altitude life history

Natural History and Distribution

Myrmica bactriana lives in the high mountains of the Tibetan Plateau. It has been found in Tibet (China), Nepal, and Sichuan at elevations from about 1770 m up to 3900 m ^[1][2][3][4]. The type locality is the upper Yangtse River at 3850 m near Darindo, Tibet ^[1]. In Nepal, specimens were collected in Solukhumbu district (Ringmo–Junbesi,2800 m, Yaral/Pangboche,3900 m, Tate,2900 m) and in Sindhupalchok district (Hoxe,1000–2000 m) ^[2][3]. They live in grasslands and subalpine meadows and almost certainly nest in soil ^[5]. Field work in Sichuan shows they also nest in rotten wood, under rotten wood, and under stones, workers forage on plants, on the ground, under rotten wood, and under stones ^[4]. On the Tibetan Plateau, this species occurs in the same areas as Myrmica tibetana and Myrmica gebaueri ^[1].

Identification and Distinction

Myrmica bactriana belongs to the Myrmica smythiesiii group. It is very similar to Myrmica bactriana – the main difference is that M. bactriana has a slightly longer scape (antenna first segment) (SI2 ~0.93 vs. ~0.91) and more abundant suberect hairs ^[1]. Some researchers think these might be just different populations of the same species. Workers are reddish to reddish-brown with lighter legs. The head is longer than wide, with roughly parallel sides and a straight back margin. The propodeal spines are short, straight, and point backward at about 45°. The surface of the body is shiny, with fine, wavy ridges on the front of the head and on the thorax ^[1].

Housing and Nesting

Based on field observations, Myrmica bactriana probably nests in soil, rotten wood, or under stones ^[4]. In captivity, use a naturalistic setup with a soil substrate, or a Y-tong (AAC) nest or plaster nest that holds moisture well. Avoid acrylic nests. The chambers should be sized for workers about 4–6 mm long. Provide a water tube or a moist area to keep humidity up. Because this is a high-altitude species, keep the nest cool – room temperature or a bit lower is good. The outworld can include plants, stones, or other items for enrichment.

Temperature and Seasonal Care

As a high-altitude species from the Tibetan Plateau, Myrmica bactriana needs cool conditions. Keep the nest area at 15–22 °C, with a gradient so workers can choose their preferred spot. During the active season (spring to fall), keep temperatures in the upper part of this range. This species requires a winter dormancy period (diapause) of about 3–4 months at 5–10 °C to mimic the harsh Tibetan winter. This is not directly confirmed by research but is considered essential based on its high-altitude habitat ^[5]. Do not keep them warm all year without a proper dormant period.

Feeding and Diet

Like other Myrmica, M. bactriana probably eats honeydew, small insects, and other protein sources. In captivity, offer sugar water or honey for energy, plus small live or frozen insects (fruit flies, small mealworms, crickets) for protein. Feed protein 1–2 times a week and keep sugar water available all the time. Remove any uneaten prey after 24–48 hours to prevent mold. Because the specific diet of this species has not been studied, watch which foods your colony accepts. ^[5]

Challenges in Captive Care

The biggest challenge is that queens have never been scientifically described ^[1]. Without knowing what queens look like, you cannot identify or collect founding queens from the wild. This makes starting a colony from scratch nearly impossible. There is also no information on colony size, development time, or social structure. Their high-altitude origin means they need cool temperatures year-round and a proper winter dormancy. These specific needs make this species suitable only for very experienced ant keepers who can provide exactly the right conditions.

Frequently Asked Questions

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References