Advanced sound-based remote sensing technology for terrestrial animals could greatly enhance our ability of animals monitoring

research and protection.In this research

we designed an inexpensive bioacoustic localization system for terrestrial animals

which integrates commercial off-the-shelf recorders and wireless controllers and is much cheaper than most animal localization systems.Combined with the bioacoustic localization software we developed

the system is veri? ed to have the ability to ful? ll our requirements because its localization errors along the X and Y directions are both less than 1.69 m

although the error along the Z direction is a little bit larger.In order to assess the factors influencing the localization accuracy

we applied Monte Carlo simulation method to conduct error analysis.We found that errors

including in surveying recording stations

estimating Time Difference of Arrival（TDOA）

and estimating sound velocity

will all influence the final localization accuracy.Besides

the Monte Carlo method could also be used for choosing the values of system parameters when implementing a bioacoustic localization system of terrestrial animals

such as the total number of recording stations and spatial ranges of the system.