Raspberry Pi Camera trap using the PiJuice HAT as a battery. The trap is designed with tripod attachment holes and a latch to keep the box closed.
Designed to be waterproof using rubber o-rings though this is optional. I can make no guarantees on how well the waterproofing works but it should at least protect against light rain for a time.
For waterproofing you will need to cut a length of 3 mm o-ring and glue the ends together with superglue then place it in the groove around the edge. Use a 2.5mm o-ring on the camera attachment.
You can use silicon caulk around the pir sensor to waterproof that.
Finally depending on how well the filament you used behaves with water you may want to coat your print in a silicon sealant such as Fabsil.