Using a Bat Detector for other mammals

[nightshade]

I was asked can shrews be found using a Bat Detector? Henrya over to you
I seem to recall you gave an answer regarding Rats and a detector

[Gill Catton]

Originally Posted by nightshade

I was asked can shrews be found using a Bat Detector? Henrya over to you
I seem to recall you gave an answer regarding Rats and a detector

I have noticed that if you have the detector at around 20 you pick up the tiny rustling caused by small mammls (and it's just a characteristic rustling you can tell it's a mammal rather than a reptile or something by the way it moves) as they run around in the hedgerows and grassland, the shrew squeak is picked up by the detector too though also by the naked ear.....

It quite unnerved me out detecting on my own at night until I realised what it was you seem to pick up everything at around 20-30!!

[eeyore]

I can pick up my sisters pet rats on the bat detector and also the voles and mice we currently have living in our garden.

[nightshade]

Hello both of you ,any definite frequencies?

[Gill Catton]

nope not particularly, I just tend to scroll to the strongest sound at the time but audible between 20 and 30 to varying degrees I reckon!

[henrya]

Rodents of a variety of species produce ultrasound, especially young animals. Included are House Mouse, Brown Rat, Wood Mouse, Bank Vole and Field Vole.

Various species of shrews also produce ultrasound, but I haven't got any details on British species to hand. It has been suggested that Hedgehogs can produce ultrasound.

Note that these are all vocal sounds - quite different from the rustling that Gill mentions.

But I've never been using a bat detector and heard a sound and said "Ahah, A Wood Mouse!". I've often been using a bat detector and said "What the deuce is that?"

henrya

[Gill Catton]

Originally Posted by henrya

Rodents of a variety of species produce ultrasound, especially young animals. Included are House Mouse, Brown Rat, Wood Mouse, Bank Vole and Field Vole.

Various species of shrews also produce ultrasound, but I haven't got any details on British species to hand. It has been suggested that Hedgehogs can produce ultrasound.

Note that these are all vocal sounds - quite different from the rustling that Gill mentions.

But I've never been using a bat detector and heard a sound and said "Ahah, A Wood Mouse!". I've often been using a bat detector and said "What the deuce is that?"

henrya

I'm sure I could hear the squeaks alongside the rustling......
hmmmmm time for a re-try. There is so much unidentified sound out there though I think much of what I'm hearing at the mo is cricket related.......
probably.......................................... ...............

[henrya]

Sorry if I misinterpreted you Gill - I thought you were just talking about rustling, and later, shrew squeaks.

Quote
There is so much unidentified sound out there though I think much of what I'm hearing at the mo is cricket related.......probably
Endquote

Certainly Dark Bush Cricket overwhelms the detector in my garden at present - I can almost hear the bats shouting "Put a sock in it, you lot!"

Of course, if you have a waterproof bat detector you can search for various dolphins!

henrya

[Gill Catton]

Originally Posted by henrya

Sorry if I misinterpreted you Gill - I thought you were just talking about rustling, and later, shrew squeaks.

Quote
There is so much unidentified sound out there though I think much of what I'm hearing at the mo is cricket related.......probably
Endquote

Certainly Dark Bush Cricket overwhelms the detector in my garden at present - I can almost hear the bats shouting "Put a sock in it, you lot!"

Of course, if you have a waterproof bat detector you can search for various dolphins!

henrya

It's the stuff that you can't hear with the naked ear that always catches my attention, but it's seemingly impossible to work out where the sound is coming from so I guess I'll never know what I'm listening to!

[eeyore]

my sisters pet rats make a rappid clicking noise on between 35 and 45 khz - the woodmouse makes a sort of ttttttt noise not that disimilar from the daubentons bat at about 25khz , while the voles makes a rythmic scratching sound which i suspect is his claws at about 45khz.

death watch beetle can be picked up at arround 160khz but you need a modified detector to go that high.