Yes, they were only after big fruit bats, hence the large mesh. One place I was in PNG our recreation room only had walls up to waist height and to keep the number of insects inside down at night, the lights were under the wide eaves. As a result, quite often we had tiny little insect eating bats flew right across the room just above head height, obviously delighted at the cornucopia that we had provided for them!
A bit alarming at first, but you soon got used to it.

