It has been more than a year since I hung a bag of red chillies in my porch to discourage Common Fruit Bats (Cynopterus brachyotis) from roosting.
Initially the bats came but left immediately. However, within a month less than a handfull returned and roosted, polluting the floor. By then the chillies had dried. So a fresh bag was hung that lasted less than 2 months before they dried up and became ineffective.
A few bats did return on and off, so I gave up hanging new bags of chillies.
Eventually the bats disappeared altogether, except for a few strays now and then. My porch is generally free of roosting bats for about 9 months now.
The image above shows the old bags of chilles left hanging from the rafters.
11th June 2016