As well as keeping plant pests (Weeds)
control there has been continual effort in Trelissick Park over the
years in keeping
animal pests (Predators) under control.
Wellington Regional Council (Greater
Wellington) has been very proactive for many years in regional predator
elimination and control, as has the Wellington City Council within City
parks and reserves.
Bait stations were introduced into Trelissick Park in early 1998 by the
Background information on this is contained in Regional Council Predator Control
As a result there has been little evidence of
possum activity in Trelissick Park for the
last decade though possums were once a great menace inhibiting native
plant regeneration in the Park.
ongoing problems with rats, stoats (and other mustelids),
hedgehogs, and rabbits. In particular, rats and
stoats kill native birds and eat their eggs in nests.
To a lesser extent, mice can be considered
predators as well as feral cats anywhere in the Park and some
domestic cats on Park
boundaries near residential areas.
Dogs, off-leash and off-track and not under
control, can be fatal for
fledgling native birds.
And it should be mentioned that there are a very
small minority of the human visitors to the Park who damage or destroy
the native fish and eels and the native birds or their habitat.
Camera Sightings of
In September and October 2017 a Victoria
MSc student conducted a study of animal intruders into a portion of
Trelissick Park using a dozen motion activated cameras. Some 40,000
images were recorded and evaluated. The cameras were 10m or 20m off
track to eliminate any track users.
The following list gives the numbers of confirmed
free range animals (excluding birds):
A summary of the project is contained at the following link Project Summary (November 2017)
Norway rat Rattus norvegicus
Ship rat Rattus rattus
Hedgehog Erinaceus europaeus
Hare Lepus europaeus occidentalis
House mouse Mus musculus
Feral rabbit Oryctolagus cuniculus
Feral and unwanted cats Felis catus
Off-leash and off-track dogs Canis
bait station servicing was taken over by TPG volunteers in 2008 and has
carried out in partnership with the City and the Regional
Councils. Generally the bait stations are visited monthly for
replenishment as necessary. Mustelid traps (DOC200) were also
introduced into the park in 2008 and are also checked monthly by
volunteers for victims and/or resetting as needed.
We currently have five volunteers - each of whom do monthly rounds of
their allocated traps and stations.
The possum/rodent bait for many years was 'pellet'
bait. In 2016 the bait was changed to be 'block' bait - to lessen
the chance of pellets being dislodged from the bait stations and to
lessen the chance of hoarding by rats. The block bait is designed
mainly for rodents.
Monitoring trials by
Victoria University (chew cards,
tracking tunnels, and night motion-sensitive videos) have identified
interesting pest animal
behaviours and distribution patterns. There were 60 chew card locations on three chew lines as shown on this
Chew Card locations
(July 2012 update) and the locations were visited monthly for a year to
replace the chew cards and to ascertain which predators had visited.