We have been integrating larger FLIR cameras like the A615 into smaller UAVs for USDA and NOAA, and now there is a new line of tiny, cheaper (relative) Ax5 machine vision cameras. These are small enough to fly on many hobby-grade multi-rotors.

This mounts fits the FLIR Ax5 Series of compact thermal cameras, and lets them attach to a 1/4"-20 thread.