I have a friend who worked on a project here in NZ where he made bird boxes with built in scales. It had a solar panel and a LoRa to get results back to base. I

I have a friend who worked on a project here in NZ where he made bird boxes with built in scales. It had a solar panel and a LoRa to get results back to base. It had a series of calculation to work out how much feeding was going on etc. From memory the boxes are on Hauraki Gulf islands - Tiritiri Matangi is one location I think.