Saturday, 16 June 2018

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.

Sunday, 3 June 2018

BirdBox2018: our mixed species nest

Its been a very interesting season watching how the story unfolds in our mixed tit species nest.


The chicks have now left the safety of the box to take their chances in the big wild world.


So this post just reviews what we observed and what I think may have happened.

Friday, 18 May 2018

BirdBox2018: Blue Tits hatch in Great Tit nest

All 6 of the blue tit eggs hatched by the 15th May.


By my reckoning it was almost 5 weeks from the time the first egg was laid until the last had hatched.

Saturday, 12 May 2018

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.

Saturday, 28 April 2018

the Hog is back!

After an absence of 4 or 5 years, the hedgehogs have returned to our garden.


Well, one hog, at least that's a start.


So now we need to give this little guy a helping hand.

Thursday, 26 April 2018

BirdBox2018: The Great Tit Takeover

Things were going well for our resident blue tits.


They had spent weeks checking out the nest box on our maple tree before building a nest and laying a few eggs.


Then the great tits rocked up!

Wednesday, 25 April 2018

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.

Saturday, 7 April 2018

Bat Call Logger: full-spectrum analysis

With the recent step change in the weather, I was able to run the system last night and capture bat calls for the first time this year.


It looks like my modifications to the system are paying off.


I'm now getting full-spectrum (ultrasonic) recordings which are much easier to analyse than the previously used Frequency Division recordings.

Saturday, 31 March 2018

Radio Caroline: visiting the Ross Revenge

Over the Easter weekend of 1964, the M.V. Caroline dropped anchor a few miles off the Essex coast and started broadcasting popular music.


A certain 12 year old, super-glued his ear to the family wireless, and within 3 weeks was joined by 7 million other listeners. Within a year, there were over 20 million of us.


Who would have thought that 12 year old would still be listening to Radio Caroline 54 years later?