An open‐source sensor‐logger for recording vertical movement in free‐living organisms

Measuring individual‐based movements in free‐ranging animals is relevant to our understanding of many basic ecological principles (migration, competition, optimal foraging) but has been difficult to realize in a small size. We have developed a freely available, open‐source, non‐invasive datalogger that can measure an animal's altitude or elevation (A) at sampling intervals greater than once per second, storing up to 10,000 total samples,...