Anabat Roost Logger

£415.11 Ex. VAT
In stock

The Anabat® Roost Logger is a low cost, weatherproof and very low power bat detector optimised for monitoring bats at and around caves, mines and other roost areas.

The Roost Logger is a completely self-contained monitoring station highly optimised for roost monitoring. It offers a highly flexible sampling regime for very long-term monitoring without an external power source. It is entirely compatible with existing Anabat software. 

Ideal for:

  • Mine closure or gating assessment
  • White-Nose Syndrome detection (through abnormal diurnal activity)
  • Monitoring activity levels and temporal patterns at any roost



  • Optimised for most colonial roosting bats (see tabs for more information)
  • Weatherproof & washable
  • Constructed with sealed microphone
  • Records temperature and battery voltage
  • Easy decontamination for White-Nose Syndrome (WNS) protocol
  • Narrow bandwidth mic reduces noise from echoes
  • Extended recording time with internal batteries (up to 6 months at night only, with 50% duty cycle or 6 weeks continuously)
  • Calibrated – all Roost Loggers leave factory set to same sensitivity


 Optional accessories (sold separately):

  • D cell batteries
  • SD card
  • Python Lock
  • Camo Strap
  • Card Reader 



  • External Dimensions: 206 x 167 x 90 mm (8.1 x 6.6 x 3.5 inches)
  • Weight : 1.5kgs (3.3lbs) with batteries
  • Power Requirements: 4 D Cell Batteries
  • Battery Life: Up to 6 months on internal batteries 
  • Memory SD Card (up to 32GB)
  • Microphone: Directional, weatherproof
  • Audio Output: None
  • Frequency Range: Optimized for 40 - 44kHz; Although the Roost Logger broad band microphone has a very steep peak frequency, if bat gets close enough all frequencies will be recorded.
  • Housing: Weatherproof and shock proof, with handle for carrying
  • GPS: None
  • Software: Free to download CFC Read and AnalookW
  • File Output: .dat Anabat Files (Zero Crossing Analysis)
  • Includes: Microphone, USB Cable, magnet for checking status
  • Warranty: 1 year



The Roost Logger microphone has a peak sensitivity of about 42kHz with a decreasing sensitivity to frequencies as they get further from 42kHz. The peak is quite narrow, but appropriate for most species at roosts or in other high clutter situations, as part of their calls typically falls in the band of greatest sensitivity. It is also sensitive to a wide range of other frequencies, but away from 42 kHz the sensitivity drops rapidly and the bat will have to be close for those frequencies to be detected.
This sort of response is appropriate for monitoring roosts. Identification is not the objective, and the low overall sensitivity is good for reducing the impact of echoes and the likelihood of detecting bats outside the roost. It is especially important to reduce the impact of noise in a detector designed to run for weeks or months at a time without using too much battery or storage space. The peak of the response also greatly reduces sensitivity to most unwanted noise, which is usually at lower frequencies. 

Battery Life

The Roost Longer uses a strategy called “Capacity Farming” which ensures that the desired Run Time can be achieved, even if the desired Sampling Time cannot. It makes sure that Sampling is limited so there will still be enough energy left in the batteries to run the Roost Logger even at the end of the desired Run Time. How well this works depends on how closely the battery capacity meets its expectations since this is the one factor about which there is most doubt. Therefore, if achieving the desired Run Time is important, it will always be important to treat the battery capacity conservatively. Just because a D cell may be rated at 18,000 mAH doesn’t mean that capacity will actually be realised when changes in temperature and other factors are taken into account.

At the simplest level, Capacity Farming makes it possible to achieve long run times by reducing the amount of Sampling Time per day. The easiest way to do this is to sample only at night – which is usually completely appropriate for bats! Sampling only at night will immediately double the run time by reducing the duty cycle (the
time spent sampling as a fraction of the total run time) to about 50%. However, for some purposes such as White-Nose detection, sampling during the day is just as important.

Battery Information

 You will only need TWO lithium D cell batteries. This is because each battery has 3.6V (3.6 x 2 = 7.2V). The two lithium batteries should be placed on the left side slots, below the power switch. The power switch should be switched to the left to power up the Roost Logger (Fig. 7). You can use AA lithium batteries with an adapter, but you will need four because they are 1.5V.

SD Card

Due to how the device was programmed, only up to 4 GB of space can be used on an SD card no matter what its actual size, use ones that say "slow" or class 4 or lower to minimize battery usage.


We now offer FREE UK SHIPPING for online orders over £30 to the UK mainland (under 30kg), including service & repair items. For information on qualifying requirements for free shipping, please see our delivery page.

We aim for next working day delivery on all UK mainland orders received before 3.00pm. Where products need to be made to order or are not a regular stock item, or during busy times of year, despatch times may be longer.

If your order is urgent please call us on 01451 833 181. There is usually an additional charge for timed delivery.

We will always use a reputable courier company and require a signature on delivery. Smaller items are usually shipped using Royal Mail or DPD, and larger items are sent using TNT or Tuffnells. Palletised deliveries are with Pallex.

We will email you shipping confirmation after your order has been despatched. Where available, you will also receive tracking notification by email or text. If you need to track your parcel urgently then please contact us.

We can deliver to anywhere in the world, but you may need to contact us for a quote.

If your order doesn’t qualify for free shipping then UK mainland delivery starts at £6.67 ex VAT, while Highlands and Islands delivery starts at £12.50. You can calculate shipping costs using the basket.

For full delivery information please click here.

Important Information About Backorders

At Wildcare there are times when items are only available on a backorder basis, either due to high demand or if the item is a special order item. We refer to these as ‘backorder items.

Backorder items are clearly listed on our website as ‘Order To Reserve Stock (Backorder)’. Items that are in stock and ready to be shipped immediately are listed as ‘In Stock’.

When you place an order for a back order item or an order that includes back order items, a member of our team will be in contact within 48 hours of your order to confirm the lead time for delivery. For any queries before then, please call us on: 01451 833 181

Avoiding Disappointment

We cannot guarantee that a backordered item will come back into stock or be delivered for a specific date, however we will always do our best to keep you informed and updated.

If your back order is urgent or required within a specific time frame we suggest to call us on 01451 833 181 so we can keep your requirements in mind throughout the waiting period.


If you receive damaged items or the wrong goods, please let us know straight away so that we can arrange for them to be returned to us and replaced as quickly as possible.

You will need to obtain a Returns Number  - please call us on 01451 833 181 or email

Please return goods, WITH THE RETURNS NUMBER MARKED ON THE PARCEL to: Wildcare, Eastgate House, Moreton Road, Longborough, GL56 0QJ

We may ask for a photograph any damaged items before we agree to replace them.

Please click here to view our full returns policy.