"While there are a lot of caveats and limitations there, the fact that you can set up a speaker in your yard and conceivably store any amount of data in songbirds is fucking crazy"

— Benn Jordan, "I Saved a PNG Image To A Bird"

https://www.youtube.com/watch?v=hCQCP-5g5bo

31 min video about recording birds and bats with ultrasonic microphones, with some bonus content about #birdwatching / #birding apps, automated bird recording software, and acoustic cameras that can show you where a sound is coming from.