“Beatriz DaCosta’s Pigeon Blog (2006) used miniature air pollution sensors, GPS units, and transmitters attached to homing pigeons to evaluate and map local air quality.”
This is the project Website address: http://www.pigeonblog.mapyourcity.net/.
“PigeonBlog provides an alternative way to participate environmental air pollution data gathering. The project equips urban homing pigeons with GPS enabled electronic air pollution sensing devices capable of sending real-time location based air pollution and image data to an online mapping/blogging environment. Pigeonblog is a social public experiment between human and non-human animals.”
The image below is the screenshot of PigeonBlog.
 Edward A. Shanken, Art and Electronic Media, p.36