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?

Karamu Data Section Master

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

60 nights

All-time detector-nights of listening effort across all sites.

2

Sites monitored

0

Species recorded

0

Bat passes recorded

5,693

Sound files analysed

0

Rat detections

Bat passes by month

Bars = bat passes by call type (both sites). Survey night = one detector for one night (effort) — n under months = survey nights (Arataki Link Reserve + Mushroom Farm, 2026). No bat calls recorded yet.

—
—
—
—
—
—
0
0
0
—
—
—
Jan —
Feb —
Mar —
Apr —
May —
Jun —
Jul n=9
Aug n=48
Sep n=3
Oct —
Nov —
Dec —
  • Echolocation
  • Foraging
  • Commuting
  • Social

Activity & distribution maps

Click a map to zoom in.

Karamū River Catchment – all known bat records
250% 220% 190% 160% 130% 100%
Karamū River Catchment – 26/27 survey sites
250% 220% 190% 160% 130% 100%

How this compares to other projects

Project Survey Nights Bat Passes Recorded Call-type breakdown Last update Status
Karamū Catchment 60 0
0 bat calls
29 Sep 2026 Active
Mohi Bush 901 10,090
66% 6% 27% 2%
18 Sep 2026 Active
Rowe Bush 990 22,281
85% 15%
20 Sep 2026 Active
Echoes Around Te Mata 182 1,349
100%
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

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.


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.


Karamu Data Section Master

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

60 nights

All-time detector-nights of listening effort across all sites.

2

Sites monitored

0

Species recorded

0

Bat passes recorded

5,693

Sound files analysed

0

Rat detections

Bat passes by month

Bars = bat passes by call type (both sites). Survey night = one detector for one night (effort) — n under months = survey nights (Arataki Link Reserve + Mushroom Farm, 2026). No bat calls recorded yet.

—
—
—
—
—
—
0
0
0
—
—
—
Jan —
Feb —
Mar —
Apr —
May —
Jun —
Jul n=9
Aug n=48
Sep n=3
Oct —
Nov —
Dec —
  • Echolocation
  • Foraging
  • Commuting
  • Social

Activity & distribution maps

Click a map to zoom in.

Karamū River Catchment – all known bat records
250% 220% 190% 160% 130% 100%
Karamū River Catchment – 26/27 survey sites
250% 220% 190% 160% 130% 100%

How this compares to other projects

Project Survey Nights Bat Passes Recorded Call-type breakdown Last update Status
Karamū Catchment 60 0
0 bat calls
29 Sep 2026 Active
Mohi Bush 901 10,090
66% 6% 27% 2%
18 Sep 2026 Active
Rowe Bush 990 22,281
85% 15%
20 Sep 2026 Active
Echoes Around Te Mata 182 1,349
100%
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.

Follow our journey.