Bedford Technical - Building frogloggers since 1994

The latest model, the FL-2014, is in the final stages of development and will be undergoing field tests in November and December.

The FL-2014 will look very much like the model FL-V which is shown here. To get an idea of how the FL-2014 will work please refer to the manual for the model FL-V at the bottom of this page. The new model FL-2014 will, however, have many new improved features along with a lower cost. Click here for more info on the FL-2014.

Froglogger Model V

The goal of froglogger design is to create a low cost, versatile, high-quality automated recording system incorporating the latest audio recorder technology while reducing the overall cost. The high sensitivity and low self-noise of the microphones and recorder can result in detection of anurans (or other species) that may not be detected by other similar systems. This unit is targeted for use by biologists working for universities and government agencies where the cost to use other devices currently available is prohibitively high. It may be especially beneficial for use by students or in situations where a large number of frogloggers are needed for use simultaneously.

     In the past there was a good chance that no matter where you lived you weren’t too far away from an area where you could hear frogs calling.

     That’s changed. The populations of frogs are declining in many areas of the world. Whether in an urban area or in a rain forest there used to be a healthy population of frogs and toads but in some of these areas the populations are declining or in some cases have completely disappeared.

     What’s causing this decline? Evidence points to habitat loss, climate changes, UV radiation, contaminants and pollutants, disease, and predation by invasive species. One question is that while the declines are occurring in urban areas as suspected there are also declines in unsuspected places like our protected national parks.

     More study is necessary to determine what is causing these declines. To do these studies it is mandatory that we have methods of monitoring frog populations. The use of the “froglogger” was introduced in papers by Dr. Michael E. Dorcas and Dr. Charles Peterson over 19 years ago. Since that time various improvements have been made in these automatic recording systems. This types of automated recording systems are now in use by utility companies, state departments of natural resources, USGS, colleges and universities, NASA, and by independent environmental engineering companies. is dedicated to providing a method of recording the sounds of frog, bird and other animal populations by the use of the Automatic Recording System (ARS, ARU or Froglogger).

     More information can be found in the Froglogger Model V User's Guide (pdf).

Bedford Technical
Applied Environmental Systems




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