The public has been urged to take care in the Redwood Forest after several gin traps were found at the popular attraction.
The traps, which are used to catch possums, were discovered by members of the public near some of the main tracks and were reported to the Rotorua Lakes Council.
Three have been reported and since removed.
"We're very concerned about this," said Rotorua Lakes Council's sports and recreation manager Rob Pitkethley.
"We've searched the area thoroughly and haven't found any more but we can't be sure so as a matter of public safety we urge people to be careful and keep their children close and dogs on short leads."