DIY Bird Trackers Cost $30, Help Science

[naish]

http://blog.wired.com/wiredscience/2009/03/birdmonitors.html

[nkurz]

This is beautiful --- using home-made waterproof microphones and computer software to detect migrating songbirds.

Here's a direct link to the microphone construction details: http://www.oldbird.org/mike_home.htm

The directions are delightful, and include helpful hints such as which model number of Kmart flower pots work best for the purpose.