A field station in
a backpack.
Mobiel is a Raspberry Pi 5 with a Witty Pi 5 for power management, 4G for positioning, GPS for the exact location, and a microphone that listens to what happens in places where no one normally spends the night. I set it up in the evening, pick it up in the morning, and run the recordings through the same pipeline as the fixed stations once I'm back home.
No expeditions are online yet. Once I take Mobiel into the field, the nights will show up here, with a day or two of delay because the audio is only processed once I'm back home.
The first night is still to come.
The idea is simple: Mobiel goes out into the field, to places the fixed stations never reach. A pool on the ridge, a floodplain along the IJssel, a stretch of heath after sunset. Every night turns up its own species.
But until I've actually been out with it, there's nothing here. No invented nights, no example figures. As soon as the first expedition has been collected and processed, it will appear here on its own.
Mobiel is built around a Raspberry Pi 5 in a waterproof case. A Witty Pi 5 switches the system on and off based on sunset time, a 4G modem provides internet for positioning and remote logging, and a GPS module records the exact placement. The microphone and audio interface are the same as on Bladerdak. A power bank delivers around thirteen hours of power, plenty for a whole night plus some buffer.
Audio is collected once I'm home and analysed by the same pipeline as the fixed stations. As a result, trips appear on the site with a 24 to 35 hour delay.