RESIDENTS need to be on snake alert after increased sightings during the warm start to spring.
Colyton resident Lisa Provost called National Parks and Wildlife after an eastern brown snake was spotted slithering along the driveway on September 27.
It is the second most venomous land snake in the world.
"We've lived here for five years and have never had one here until now as we live far away from the bush," Mrs Provost said.
"The first thing you do is to panic.
"I won't let my kids play in the backyard and I make them take torches if they have go out the front at night."
St Marys-Mt Druitt is part of the WIRES Blue Mountains district, which has recorded 34 snake sightings since September 1.
"We urge people not to approach them as they're more frightened of us than we are of them," a spokeswoman said.
WIRES reptile co-ordinator Joanne Wenban said red bellied black and eastern brown snakes are the most common ones seen.
"It's been a lot busy a lot sooner than usual," she said.
She recommends keeping children and animals well clear if a snake is in the yard.
"If it's left alone, it tends to move on," she said
"But if it decides to curl up somewhere, contact WIRES.
"Keep doors shuts as the snake may come in looking for somewhere cool.
"If they've had a bad experience at a certain point — such as hearing a dog barking — it's unlikely they'll go back.
"Keep your grass short and yards clean as they're only looking for a good place to hide."
WIRES: 1300 094 737.