One Kerry councillor believes a wide-scale rewilding programme is bad for people.
Rewilding is a strategy used to promote biodiversity by re-introducing plant and animal species that have been driven out, largely due to humans.
But Independent Councillor Donal Grady told Lunchtime Live there could be some unforeseen consequences.
"We'll say within a space, they decided to leave the grass grow over the last two years, but what they forget about every football pitch, camogie pitch and everything.
"They forgot about the kids trying to play and that, they couldn't get into those raw pitches.
"In Killarney in particular we have 26,000 acres... I'm saying it could draw rats, it could draw lots of things and it's affecting the lives of our young children.
"And it's affecting the life of people if they want to do bowling or this or that".
Councillor Grady says he believes there is a time and place for rewilding, "but not inside in every estate".
"If we're there and there is houses right around - and the grass is left grow wild, the hedge is left grow wild, briars are left grow wild... we're sending out notices to the public for derelict sites or derelict whatever.
"And yet we're coming and we're leaving whole of Killarney go derelict - there's something wrong somewhere".
Instead he suggests: "Every household has a responsibility to keep a little bit of their garden [for] bees and birds and whatnot.
"I'm doing that and I've a lovely mown lawn - I'm leaving a section in the back for them.
"And if everyone did their own little piece, we have plenty of space right around Killarney".
It comes as an international study has recommended restoring native predator populations to keep some of the most problematic invasive species in-check.
The study involved a team of researchers from Queen's University Belfast, NUI Galway, the University of Aberdeen, Heriot-Watt and Cornell University.
It found the absence of native predators helped spread invasive species - leading to the extinction of native species throughout the world.
The research, published in Global Change Biology, found that restoring native predators could provide a solution to several of the most damaging invasive species.
