If you live in an area with mild temperatures throughout the year the bats will stay year round.
Bat sounds in attic.
In addition to hearing consistent scratching sounds another important sign you have bats in the attic is high pitched screeches.
If it gets colder than that the bats in the attic will migrate out allowing you to seal up cracks and other entry points once they leave for the season.
Bat sounds in the walls and attic the first thing homeowners with bat infestations often notice is squeaking and rustling noises coming from the ceiling or walls.
Animals may be scratching to make room for nesting burying food or even just walking and creating similar sounds.
Though bat sounds are nearly impossible to hear outdoors the noises of echolocation can be detected inside insulated homes.
Bat sounds at night.
In such cases you can hear them trying to escape the area they re trapped in.
Additionally residents may hear scratching and flapping sounds made by bats trapped inside attics or other areas of the home.
Guano piles are usually near the attic s point of entry in clumps down the attic walls near the entry and exit points and on the attic floor.
These extremely vocal pests aren t chatty without a reason.
Bats will hibernate in the winter if the temperature stays at around 35 to 40 f.
The bat s entry point is likely right above the pile of droppings.
After you have determined that you have bats you will need to figure out which species of bat you are dealing with to effectively get rid of them for good.
Squeaks and rustling sounds.
If you locate guano on a window sill or the ground look up.
Since bats live in large colonies of up to 100 to 1000 or more bats you can expect to hear them at night crawling around in your ceiling and or walls.
Bats are silent flyers but sometimes when they re in your attic they can be heard.
Though bats are typically quiet nocturnal animals they do make high pitched screeching sounds around dusk or dawn.
Scratching sounds are the most common noises you will hear in your attic and unfortunately the hardest to link to a particular animal.