ultrasonic

Gila River Bat

Ultrasonic predators and prey

I’m having a lot of fun with my ultrasonic microphone (Ultramic 200k).  It’s opened up a parallel universe of flying mammals and calling insects and the evolutionary arms race between them. In early August of this year, I found myself camping in a gorgeous spot in the canyon country of Utah – Calf Creek.  I […]

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Singing mice and the packrat band

I found out recently that mice sing.  Not just little squeaks that we can hear, but little notes that occur at the edge of our hearing – ultrasonic for those of us over 30.  Slowed down they sound like whale songs.  The common deer mice do it, so I set out to find out if

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