Karamū River Catchment
HAWKE’S BAY | LAUNCHED SEPTEMBER 2026
We've partnered with the Karamū River Catchment Collective, our first catchment group partner, to expand our bat survey across nearly 97,000 hectares of the Greater Karamū and part of the Ngaruroro catchment. With our Echoes Around Te Mata and Anaroa Road projects also operating in the catchment, three bat projects now come together to explore the region and extend our search into the Heretaunga Plains. At its heart, this is citizen science: local people setting out detectors, discovering the bats on their doorstep and contributing to conservation. Every night of recordings helps inform predator trapping, river and wetland restoration, and long-term biodiversity monitoring, while revealing how well connected the landscape is for bats.
Explore the page what our detectors pick up.
Our approach:
Unlike long-term monitoring at a single site, the Karamū project runs in phases, spreading detectors across the catchment and building a picture of bat activity over time. Each phase has specific deliverables, with findings shared with the local community. We begin by Establishing which bat species are present, then Understanding where and when they're active. From there, we Build Capacity through shared knowledge and Monitor activity and change over time. These findings will lay the groundwork for future specialist projects, from Identifying threats and establishing long-term monitoring sites to Cross-site comparisons and standardised reporting. Ultimately, this work will help us Act and Innovate, developing new survey techniques and guiding practical conservation efforts across the catchment.
This page follows the project as the work unfolds, sharing our objectives, field notes, maps and emerging insights. Right now, we're in Phase 1: Establish.
Follow along as we begin to uncover what's happening across the Karamū catchment, or get in touch if you're in the catchment and would like to get involved as a Pekapeka Patroller.
Are bats here?
Which species?
What are they doing?
What’s changing?
The Data – Karamū River Catchment
Explore the latest monitoring data, see where activity is being recorded and follow what we’re learning about bats across the project area.
Survey nights
All-time detector-nights of listening effort across all sites.
Sites monitored
Species recorded
Bat passes recorded
Sound files analysed
Rat detections
Activity & distribution maps
Click a map to zoom in.
How this compares to other projects
| Project | Survey Nights | Bat Passes Recorded | Call-type breakdown | Last update | Status |
|---|---|---|---|---|---|
| Karamū Catchment | 60 | 0 | 29 Sep 2026 | Active | |
| Mohi Bush | 901 | 10,090 | 18 Sep 2026 | Active | |
| Rowe Bush | 990 | 22,281 | 20 Sep 2026 | Active | |
| Echoes Around Te Mata | 182 | 1,349 | 29 Sep 2026 | Active |
Call-type key
- Echolocation
- Foraging
- Commuting
- Social
Field Notes
A running diary from the field — updated whenever there's something worth logging from a site visit, detector check or survey.
Scroll to see more entries
Field Observations
8 July to 3 September 2026
Arataki Link Reserve
From midwinter into the first days of spring, a gum tree (eucalyptus) on the edge of the reserve held the detector about 1.5 metres up, looking out across a vineyard paddock. Night after night it listened over the rows as the season slowly turned, and by the time it came down it had gathered 4,249 sound recordings. None held a bat call, and no rats were recorded either. It was a long, patient stretch of listening, and it gives this corner of Havelock North its first baseline.
9 July to 24 August 2026
Mushroom Farm
Over the old mushroom farm, the detector sat about 1.5 metres up a gum tree (eucalyptus) and simply listened. Across 1,444 sound recordings nothing turned up: no bat calls and no rats. A quiet result is still a useful one. It shows what the site sounds like right now, and no rats is a clean result for the local trapping programme. Sometimes the most helpful thing a detector can report is a bit of peace and quiet.
The Data – Karamū River Catchment
Explore the latest monitoring data, see where activity is being recorded and follow what we’re learning about bats across the project area.
Survey nights
All-time detector-nights of listening effort across all sites.
Sites monitored
Species recorded
Bat passes recorded
Sound files analysed
Rat detections
Activity & distribution maps
Click a map to zoom in.
How this compares to other projects
| Project | Survey Nights | Bat Passes Recorded | Call-type breakdown | Last update | Status |
|---|---|---|---|---|---|
| Karamū Catchment | 60 | 0 | 29 Sep 2026 | Active | |
| Mohi Bush | 901 | 10,090 | 18 Sep 2026 | Active | |
| Rowe Bush | 990 | 22,281 | 20 Sep 2026 | Active | |
| Echoes Around Te Mata | 182 | 1,349 | 29 Sep 2026 | Active |
Call-type key
- Echolocation
- Foraging
- Commuting
- Social
Experts on the ground
Mark Roper
Ecologist and Founder of The Bat Co. Lab
With more than 20 years of experience across freshwater, fish and bat ecology, Mark brings deep ecological expertise to every project. His work combines scientific rigour, practical field experience and a commitment to building better knowledge and outcomes for bats across Aotearoa.
Through The Bat Co. Lab, Mark combines specialist consultancy with practical tools and innovative approaches to bat monitoring. He is also passionate about making ecological knowledge more accessible and creating opportunities for communities to contribute to bat conservation.
Alice Rule
Catchment Advisor
Alice is leading the Karamū River Catchment Collective’s Citizen Science and Predator Free Karamū Programme, enabling community led monitoring and trapping across the catchment. Alice is the main catchment contact for ongoing bat monitoring, working with landowners, community groups and Mark to build a better understanding of where bats are present and how their populations are changing over time.
Our project partners
With thanks
We would like to extend our sincere thanks to the Karamū River Catchment Collective for partnering with us on this project. Their support and willingness to host our bat detectors as well as running a fleet of their own has helped make this important monitoring work possible, contributing valuable information to our understanding of the bats that call this landscape home.
We are incredibly grateful to have their support in helping us learn more about and protect these unique species.
Support bat conservation in action
Support from our community helps turn bat conservation into real, measurable action. Donations fund fieldwork, detector deployment, rapid data analysis, and community-led projects that improve understanding of bat populations and the environments they depend on. Every contribution directly supports practical, science-led work on the ground.
Want to get involved?
Want to learn more about the Karamū project? Check out the project page on their website below!
Support the project and help make this research possible. Your sponsorship goes towards the time, expertise and fieldwork needed to monitor and protect our local bat populations.