BattyBirdNET-Pi: audio alarm method to replace freq-shift

The Freq Shift feature on BirdNET-Pi works well

Its also uselful on the Batty version when listening to recordings

But I've been developing alternatives that can give a live audible indication when bats are calling within range.

BattyBirdNet-Pi

Its 7 or 8 years since I last did any bat monitoring.

 

To be honest, I got a bit bored with it.

But now I've set up a BattyBirdNet-Pi system ...I'm back!

Newts, hedgehogs, bats & BirdBox2019

I wasn't really prepared for this spring.

There was too much going on inside the house for me to be able to keep an eye on the garden.

Fortunately, time waits for no man...

DodoPi Bat Recorder: "hey, we have a live one!"

Bats flying around in mid-winter! ...whatever next?

It may be relatively rare compared to the number of recordings made each night during the summer...

...but just one recording shows that there are bats out there.

Bats, Hogs & Hibernation

I used to think that 'hibernation' meant 'sleeping through the winter' in the sense that an animal went to sleep in November and woke up at the end of March.

Maybe this is why my tortoise died.

I stuck him in a cardboard box when I was 7, and only went back to wake him up in April.

BatGuru: a British bat ID helper

My BatGuru is a program written in Gambas which helps me identify British bat species based upon echolocation call data.

It simply saves me having to juggle the key parameters in my head as I scan the charts in my reference book.

But identifying bats from their calls is tricky due to the wide variability of their calls.

Common Pipistrelle Feeding Buzz

Bat echolocation is all about catching a meal.

After all, if bats could safely feed during the day, they wouldn't bother to stumble around in the dark of night. 

So its good to catch the occasional ultrasonic recording of bats catching their prey.

Bat Call Logger: more on call analysis

Following my last post I have had some time to analyse a few more bat recordings and consider how to streamline my work flow.

Until recently, I've been carrying out all file operations using Audacity.

But there are a few things I can do via the command line, which I've pulled together in a Gambas GUI program.

Bat Detector Overhaul

About 8 or 9 winters ago, I made a bat detector based upon a circuit published by Chris Eve.

It has never quite lived up to expectations, and has been modified a few times over the years without great effect.

But now its time has come, and I'm looking more closely at ways to improve performance.