Fig. 1From: An open-source platform for sub-\(\textrm{g}\), sub-\(\upmu\)A data loggersBitTag. Left image shows the top side of a BitTag with a 0.23 g, 5.5 mA h battery. Right image shows a Pine Siskin (12–18 g) with tag. Tags are attached with a loop harness [39] constructed from elastic thread. Pine Siskin photo courtesy of Ben VernascoBack to article page