About

Rapid improvements in low-power, inexpensive, movement and environmental sensors has sparked a revolution in animal behavior research by enabling the creation of novel data-loggers (tags) that can capture fine-grained activity and location data over many months. Nevertheless, development of tags that are suitable for use with small species of birds remains challenging because of the extreme weight (and hence energy) constraints.

This website documents the use, design, and fabrication of custom tags below the mass and power budgets of most low-energy devices – $1g$ and $1\mu W$, respectively – that can collect continuous data for up to a year. The tags we present are archival, which means that the data they collect can only be downloaded by retrieving the tags. Tags with telemetry interfaces are not generally practical for long-lived data collection at the scale we describe.