If on an eave gap a funnel is correct.
Catching bats in attic.
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.
Glue board bat trapping methods people who have bats in their homes and don t know the proper way to remove them try many methods for trapping them.
The bats can be expected to depart in a couple of days.
If you locate guano on a window sill or the ground look up.
The process is complex because bats can enter such tiny areas about 3 8 inch.
Killing them is both inhumane and will create an unlivable environment due to the smell of a colony of decaying bats.
Bats will hibernate in the winter if the temperature stays at around 35 to 40 f.
Often times you have to use multiple methods to effectively get rid of the entire bat colony safely.
To get them out identify their entry and exit points making sure not to seal them while the bats are inside.
You must do a 100 effective sealup job with no mess ups and the exclusion devices must be the correct kind.
Sometimes people will take glue boards and place them in the attic where the bats are roosting.
How to remove bats from attic.
If across a large fascia board polynet is correct.
Run a fan or two with or without the lights as they cannot tolerate fast moving air.
Bats have to have a dark space and lights drive them off.