How can you somehow create a way to electronically count the number of bats going in and out of a bat house?
For my Advanced Biology class at school I am thinking about starting a bat project. I have a way to measure the temperature and humidity of the inside of the bat boxes, but would really like some sort of sensor to count how many bats are in there...and manually isn't going to work so well. Any suggestions? Any other bat-related ideas? (Other than selling bat guano...already been suggested) thanks