Boggomoss Snail An Endangered Queensland land Snail

Boggomoss Snail

Adclarkia dawsonensis: The Boggomoss Snail

Adclarkia dawsonensis, more commonly known as the Boggomoss Snail, Dawson River Snail, or Dawson Valley Snail, is a small but ecologically significant species endemic to a limited area of Queensland, Australia. While it may not be the most visually striking Australian creature, this unique land snail plays a vital role in the ecosystem it inhabits.

Taxonomy and Physical Characteristics

The Boggomoss Snail belongs to the genus Adclarkia and is a nocturnal land snail species. It has a relatively small shell, measuring just under an inch (21-26 mm) in diameter and 14-16 mm in height. The shell is almost flat with a slightly elevated spire and a very small central depression. The shell color varies within the species, ranging from light brown to horn-colored.

The animal itself is grey with a distinctive mustard-colored mantle. One of its most striking features is the presence of irregular black blotches on the lung roof, which are visible through the semi-transparent shell.

Habitat and Distribution

The Boggomoss Snail is found exclusively in the Dawson Valley region of Queensland, Australia. Its preferred habitat includes the floodplains of the Dawson River, where there is ample canopy cover, moisture, fallen logs, and deep leaf litter. The snail requires a moist environment to survive and cannot thrive in open country.

Currently, there are only two known locations where the species is found, both in the Taroom area. The limited distribution and specific habitat requirements of the Boggomoss Snail contribute to its vulnerability and critically endangered status.

Ecological Importance

Despite its small size, the Boggomoss Snail plays a crucial role in the Dawson Valley ecosystem. Like many other snail species, it serves as an important food source for various animals, including birds, rodents, frogs, reptiles, beetles, ants, calliphorid flies, and even other snails.

Moreover, the Boggomoss Snail is a significant contributor to the decomposition process. By feeding on fungi and other organic material growing among decomposing leaf litter and fallen timber, the snail helps break down organic matter, enriching the soil and facilitating nutrient cycling in the ecosystem.

Life History and Behavior

While much remains unknown about the life history of the Boggomoss Snail, it is estimated that camaenids (land snails) in arid parts of northern Australia may have lifespans ranging from 10 to 20 years.

The snail is known to enter a dormant state during dry periods, sealing itself to the underside of logs or leaves in the litter. This adaptation allows the Boggomoss Snail to withstand drought conditions and survive in its variable habitat.


Boggomoss Snails reach sexual maturity in their second year. As hermaphrodites, each individual has the potential to contribute to the survival and reproduction of the species. However, more research is needed to fully understand the reproductive biology and strategies of this elusive snail.

Conservation Status and Threats

The Boggomoss Snail is classified as critically endangered due to its limited distribution and the numerous threats it faces. The primary threats to the species include:

  1. Habitat loss and degradation: Much of the native vegetation in the Dawson Valley has been cleared for farming, leaving only small pockets of suitable habitat for the snail.
  2. Collection of fallen timber: Campers at Isla Delusion Reserve have been known to collect fallen timber for firewood, inadvertently destroying the snail’s microhabitat and potentially killing individuals in the process.
  3. Natural disasters: Flooding and fires can have devastating impacts on the Boggomoss Snail’s population and habitat.
  4. Invasive species: Feral pigs, mice, and cane toads pose significant threats to the snail by altering its habitat or directly preying upon it.
  5. Climate change: As the Boggomoss Snail is dependent on moist microhabitats, changes in temperature and precipitation patterns due to climate change could further jeopardize its survival.

Conservation Efforts

Given the critical status of the Boggomoss Snail, conservation efforts are essential to ensure its long-term survival. These efforts may include:

  1. Habitat protection and restoration: Preserving and enhancing the remaining patches of suitable habitat in the Dawson Valley is crucial for the snail’s persistence.
  2. Monitoring and research: Regular monitoring of known populations and further research into the species’ biology, ecology, and threats can inform effective conservation strategies.
  3. Community engagement and education: Raising awareness about the importance of the Boggomoss Snail and its habitat among local communities and visitors can help foster a sense of stewardship and reduce human-induced threats.
  4. Invasive species management: Controlling feral pigs, mice, and cane toads in the snail’s habitat can help mitigate their impact on the species.
  5. Ex-situ conservation: Establishing captive breeding programs or translocating individuals to suitable, protected areas may be necessary to safeguard the species from extinction.

The Boggomoss Snail, Adclarkia dawsonensis, is a small but ecologically significant species that serves as a reminder of the importance of conserving even the most unassuming creatures. By protecting this unique land snail and its habitat, we not only ensure the survival of a fascinating species but also contribute to the health and resilience of the entire Dawson Valley ecosystem.

Through concerted conservation efforts, research, and community engagement, we can work towards a future where the Boggomoss Snail continues to thrive in its native range, playing its vital role in the intricate web of life that sustains us all.