The second one was photographed in the same reserve in January 2018.
"We are concerned about this second water dragon," said Sue Moore, senior biodiversity ranger for DOC Manawatu.
"We have contracted a lizard expert to catch and remove this water dragon from the reserve.
"But in warm weather, reptiles can cover large areas rapidly, so we welcome any additional information the public may have to help track it."
"If you have seen a water dragon in Papaitonga Scenic Reserve or have any information that could help us, we'd like to hear from you," Moore said.
It is not known whether the water dragons escaped from captivity or were intentionally released. Either way, Moore said it was a problem.
"A pet in the wild is a pest.
"Water dragons may prey on native Powelliphanta snails found in the reserve or spread diseases to native lizards."
"It's not good for the water dragons either. Pets are usually not equipped to survive in the wild.
"The first water dragon removed from Papaitonga Scenic Reserve was in poor condition and had rat bites on its tail."
If reporting a sighting, provide a description of what you saw, where and when. Include photos and/or a GPS location if possible. Do not attempt to catch it.
Contact DOC Manawatu on (06) 350-9700 or email: manawatu@doc.govt.nz