Countryside Critters: monitoring wildlife on private land

Koala image

Countryside Critters (formerly Countryside Koalas) is an ongoing project that is monitoring the changing status of wildlife in privately owned forests. Until recently, Koalas were the focus of this program but the novel acoustic survey technique being used is ideal for efficiently detecting more wildlife species, especially when paired with additional remote devices. Prior to this work, there had been very few systematic studies looking at wildlife occupancy in private native forests.

Forestry Research, NSW Department of Primary Industries and Regional Development (DPIRD), in partnership with Local Land Services, is monitoring wildlife across private native forests in north-east NSW using acoustic, ultrasonic and unbaited camera trap surveys. The acoustic and ultrasonic survey methods rely on recording distinctive wildlife sounds and echolocation calls (produced by insectivorous bats) and processing these with cutting-edge AI trained to recognise calls of iconic forest species. Camera trap surveys capture images of native wildlife in private native forests. As of 2025, the acoustic surveys are moving into their seventh consecutive spring, with camera trap and ultrasonic surveys now in their second and third year.


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Frequently Asked Questions (FAQs)

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• What is the aim of Countryside Critters?

To monitor changes in the status of different wildlife species over time in private native forests. An additional aim is to look at the effects of land use history such as private native forestry as practiced under the latest codes of practice.

• Who can participate in Countryside Critters?

Countryside Critters is open to landholders with private native forests in the North-east region of NSW. To check your eligibility, please visit our postcode checker.

• Why monitor wildlife in private forests?

There are few studies that monitor how the status of wildlife changes in private forests, yet private forests make up the bulk of forests in NSW. They make an important contribution to the conservation of many species.

• What kind of wildlife might be recorded?

Audiomoth recorders can detect vocalising wildlife such as koalas, owls and gliders as well as the ultrasonic echolocation calls of microbats. Camera traps can record wildlife that use the forest floor, such as bandicoots, possums and other ground-dwelling species. The species recorded will vary depending on the habitat, season and location of your property.

• How much time is involved?

The monitoring equipment is typically deployed for 10-14 days. Participants are only required to set up the equipment at the beginning of the survey period, retrieve it at the end, and return it using the postage materials provided by the project team.

• How often will my property be surveyed?

Properties are surveyed each year in spring as part of this long-term monitoring program. Repeat surveys are important for understanding how wildlife populations change over time and how they respond to disturbance events.

• What products will be produced?

Each landholder will receive a personalised report for their property about what species were recorded. Trends over time showing changes in site occupancy for different species in relation to drought, fire, floods and other events will be compiled and published in a peer-reviewed scientific journal.

• What is the size of a site?

One audiomoth samples an area of about 3 ha (100 m radius) for louder calling species, which is considerably less than the human ear. For microbats, an audiomoth will record bat echolocation over an area of about 0.1 ha (20 m radius), but bats will rapidly come and go as they fly throughout their habitat when feeding.

• Will the equipment disturb wildlife?

No. Audiomoth recorders and camera traps passively record sounds in the environment and do not emit any signals or calls. These technologies are widely used in wildlife research because they provide an effective way to detect animals without handling or directly interacting with them.

• Why can't we hear microbats?

Microbats call at a high frequency (pitch) when they are echolocating, which is above the range of human hearing. This is referred to as ultrasound.

• How does a camera trap work?

Camera traps have a motion sensor to trigger a photo when movement is detected. At night the photo is illuminated by infrared light that is invisible to most animals.

• How is the recorded sound analysed by DPIRD?

DPIRD uses in-house species recognisers built using artificial intelligence to scan recordings for sounds that match a particular species. These recogniser hits or matches are then validated by the team at DPIRD.

• Will we share your data?

No. we will keep your data securely and compile it with those of other landholders for analysis of trends across the region. Details about species recorded will not be shared in relation to your property. However, you are welcome to add the species records that we provide to you in a landholder report to the government database called NSW BioNet should you wish.


Project in Action

The survey relies heavily on landholder participation. At present more than 100 properties from south of Newcastle to near the Queensland border are part of the project.

Mini-acoustic recorders, 'Audiomoths', are mailed to participating landholders. These recorders can be set-up to record sounds produced by wildlife that can be heard by humans or sounds that are produced by bats which otherwise are mostly outside the hearing range of humans. The recorders are set on trees in forest habitat on the property, retrieved after 10-14 days by the landholder and posted back to our Ecology team for analysis. The aim is to record distinctive wildlife calls (e.g. koala bellows, forest owls, gliders, etc) that are produced during spring and the echolocation calls of bats that are also active at this time. Wildlife cameras are also set on tracks in forest habitat to detect wildlife that may be moving along these, including introduced predators (e.g., foxes).

Previous Work

Countryside Critters builds on previous work completed under the NSW Koala Strategy that used the same acoustic survey method to take a snapshot of koalas across private forests in north-east NSW. Those surveys took place in 2018-2021 and the project has now evolved into the current monitoring program. Published results of that original snapshot survey can be found here.


Audiomoth used to survey for koala bellowing
Distribution of sites used in the original snapshot survey (Law et al. 2022). Triangles: 2018 (red), 2019 (yellow), 2020 (green).

Trends so Far

While we have published results for the 2019 and 2020 surveys, we have now completed a preliminary 5-year trend for male koala occupancy from Countryside Critters. Results show a large decline after the 2018-2019 drought/2019 Black Summer fires. A gradual upwards trajectory is evident since that time. This trend is quite different from the stable trend found over this time in public forests and reasons for this difference are being explored.

The modelling accounts for variation in detection probability of koalas, but further analysis is underway to account for variations in koala habitat suitability across properties and the dramatic changes in weather that were experienced over the last few years.


Trend in male koala occupancy after Black Summer Fires and accounting for variation in yearly detection probability

Individual landholder annual reports will be updated to include the additional species from these surveys. Trend analysis of the additional species detected by acoustics over the past six years will take place in 2026 and for camera trap and bat detector data after they have been deployed for five years.

More Info

See below for more information on signing up to be part of the Countryside Critters project or simply contact the Ecology team of DPIRD Forestry Research via our project email: koalas@dpird.nsw.gov.au.


Countryside Critters in Private Native Forests - Monitoring forest wildlife

References

Law B, Kerr I, Gonsalves L, Brassil T, Eichinski P, Truskinger A & Roe P. (2022) 'Mini-acoustic sensors reveal occupancy and threats to koalas Phascolarctos cinereus in private native forests.' Journal of Applied Ecology, 59, 835-846. https://doi.org/10.1111/1365-2664.14099