Lora GPS no internet

i am looking for smallest lightweight Lora GPS tracking system (transmitter+transciever) that would work without internet or cellular networks and has an open source map application to visualize transmitter and tranciever location.

aim of this tracker is to track birds in wildlife few miles radius.

anyone knows a company or a developer that sell this system?


Considering the weight of the tracker, PCBA+housing+Battery, I don’t think any birds can handle it. Or at least the tracker would influence its milage.