Omokoroa Environmental Managers Incorporated


Promoting, Protecting, Preserving the Peninsula Paradise

Based in beautiful Omokoroa, OEMI (Omokoroa Environmental Managers Inc) is a charitable society umbrella for of a number of sub-groups such as:  Omokoroa Estuaries Restoration Group; Omokoroa Bird Group; Pest Free Omokoroa; Weed Spotters;  Omokoroa History Group; the Omokoroa ANZAC group; Friends of Crapp Reserve; Friends of Cooney Reserve; Friends of Precious Reserve and TOLO (The Old Library Omokoroa - Gallery & Craft Collective). 
Charity Number: CC55086

Cooney Reserve wetland and bird habitat

How did OEMI begin?

The Omokoroa Estuaries Restoration Group began in 2004 as residents became aware of the effects of increasing areas of mangroves on the estuaries surrounding the Omokoroa Peninsula.

Long-time residents remembered the white sand beaches, fishing, sport and clear water and so a committee was formed to try to reclaim these. With great community support an application was successfully made to the BOP Regional Council for a Resource Consent to manage the expansion of mangroves in some prescribed estuary areas.

After some years of community ‘hard labour’ cutting out mangroves in the mud, an Environmental consent in 2010 allowed mechanical removal of mangroves in the consented areas by the Regional Council. Maintenance of cleared areas and seedling removal continues with volunteer help.

In the harbour plant expansion is due to sediment coming down from streams and slips in the upper catchment areas as well as from building and subdivision development and the Regional Council is working on control in these areas.

The OERG committee is now focussed on maintenance along the estuary foreshores and works with community help on planting and weed control along the esplanade reserve areas in co-operation with the Western Bay of Plenty District Council. 

OEMI was born out of this group to form an umbrella group for others such as Pest Free Omokoroa.

Pest Free Omokoroa

Pest Free Omokoroa was established in July 2005, the first part of the project being the laying of Trakka tunnels around the foreshore to establish a baseline of the actual numbers of rats present in the lower part of the peninsula, more than 80% of those tunnels showed rat activity and we knew that our native birds and other wild life, stood little chance of survival. Many residents were also reporting problems with rats getting into houses, sheds, and the Rest Home for the elderly.

By mid August 2005, volunteers laid the first bait line on the foreshore, this was quickly followed by a second line. Our first published ‘rat kill’ results encouraged more enthusiasm to lay a third line through the middle of the peninsula up to the railway line. After just one year the fourth line was laid along a further area of foreshore and across the railway line, and lastly Lynley Park was also covered, giving a continuous bait line right around the foreshore to enclose the largest urban area in the Bay of Plenty to attempt a pest eradication project. The program has 400 stations managed, and the results recorded by, 75 volunteers, this defensive line enables us to keep the middle of the peninsula almost pest free.

After one year, we ran a second Trakka exercise to compare with the original baseline, and found the number of rats tracked had dropped from 83% to 15%. By the Spring of that year we were noticing a definite increase in bird numbers, with sightings of Wood Pigeon, Grey Warbler, a White Heron and even reports of Bell Birds—all of which had not been seen or heard on the peninsula for some time, our bird counts also reflected this return. In mid summer 2007/2008 a class at school laid down another Trakka line which returned a result of 10%. Between 2008 and 2011 the tracking rate has consistently been less than 2%, showing our continuing success in not only lowering the rat population but also maintaining the number at a low level. In response the native and exotic bird populations have increased markedly, we now have regular, seasonal, reports of 20/30 Tui feeding together as well as flocks of Silvereyes. Grey Warblers and Fantails are very evident and exotic birds species are also commonly seen in large numbers.

The consistent baiting and record keeping done by the volunteers allowed us to regularly plot the [estimated] number of rats killed, which by 2008/2009 totalled 21,041, but more importantly it enabled us to produce graphs showing not only the seasonal changes, but also, a consistent down trend of the number of baits taken from 2005 thru to early 2012.

Our group has a large number of great volunteers, who manage the bait lines which cover 12/18 kilometre and willingly contribute 5500/6000 hours per annum. The administration for such a group is also considerable, and includes organising bait and replacement stations, supplying and delivering bait and publishing a monthly column.

Our Future focus:

Will be on continuing to enhance the environment on the peninsula, and with the help of our plant group, taking part in furthering the restoration of Cooney’s reserve and also establishing plantings in other reserves. Contributing to being a part of the sustainable environment project envisaged by Western Bay District Council where trees and shrubs supply a range of food types, for both native and introduced birds, for as much of the year as possible. We feel this is important because as the Smart Growth district plan progresses and development occurs, with the consequential destruction of orchards and large trees and denser in building, the loss of the large feeding areas presently available for the birds and other native species, will highlight the value of our remaining, extensive reserves. Many of the folk in Omokoroa love to walk and already act as our ‘eyes on the environment’, this resource has proved very valuable in alerting both council staff and Pest Free of any local problems.

Royal Spoonbill (Kotuku-ngutupapa)

Omokoroa Bird Group

Who are we?

We are a branch of the Omokoroa Environmental Managers. Originally we were a group of individuals who did regular bird counts to provide information to Environment Bay of Plenty and to ‘Pest Free’ Omokoroa’ on the success of its work with regard to conservation.

What do we do?

We are individuals of varying degrees of expertise, who aim to accommodate all birding interests from just enjoying the viewing birds, taking photographs or assisting with bird monitoring.

Why we do it?

We aim to promote appreciation of wild birds and encourage their conservation.

Learn about our birds.

A Bird Trail walk around the peninsula has now been completed. There are 10 different signs displaying information of birds likely to be seen in the area.

Birds that have been seen.

In and around town  (28)

Barbary Dove

Bar-tailed Godwit



European Goldfinch

Fantail (Piwakawaka)

Kahu (Harrier Hawk)


Kereru (Wood Pigeon)


Kotuku (White Heron)


Mallard Duck


Morepork - Ruru (NZ Owl)



Pied Shag




Spotted Dove




Welcome Swallow


White Faced Heron  

Birds in the estuary (14)

Banded Dotterel

Black Shag

Black Swan

Canadian Geese

Caspian Tern

Bar-tailed Godwit (6-7000 over summer)

Pied Oystercatcher

Pied Stilt

Red Billed Gull

Royal Spoonbill

Southern Black Backed Gull

Spur-winged Plover

Variable Oystercatcher   

Gannet - diving

Around the peninsula (5)

NZ Dotterel (Cooney)

Paradise Shelduck (Cooney & Precious Family)

Rail (Cooney)

Shags - various

Gulls etc - various