This is so cool — Researchers use tiny radio backpacks to track elusive gecko species | RNZ News:

The northern striped gecko live on Coromandel Peninsula and are so skilled at camouflage, they weren't discovered until 1997.

University of Otago zoologist Dr Jo Monks and masters student Harriet Wills have tracked them for the past few months, by attaching small radio transmitters to their backs.