St. Johns RIVERKEEPER recently launched an iPhone app to complement its Get Your Feet Wet guide to the St. Johns River. 

The “Get your Feet Wet, iPhone edition” guidebook app is a valuable resource that allows users to explore and learn about the St. Johns River from Palatka to the Atlantic Ocean with the convenience of their phone.

FERNANDINA BEACH, Fla. -- They can cause the kind of damage that can lead to costly home repairs. They are the four-legged critters looking for a place to stay warm.

"There are rodents, squirrels and raccoons always around this time of year looking for nesting sites," said Jeff Saylor.

Saylor, with Arrow Exterminators, said those nesting sites are in First Coast homes.

Saylor the entry points are easy to find; just look near the air conditioning systems.

"Service lines are easy access points for rodents to get into your home," said Saylor.

He said another weak spot is the soffit, the area under the eaves of the roof. 

"Rats can get through an area the size of a quarter, mice can get through about the size of a dime," he said.

Even a tree near your home can become an access point.

Saylor's advice is pay attention to the surroundings.