2.3 Data analysis
Kaleidoscope Pro can be used to
analyze recordings of bat calls for the purpose of automatic species
identification. Verified recordings of bat calls are used as the
foundation for Classifier Libraries in Kaleidoscope Pro. Classifier
Libraries contain multiple individual Species Classifiers. Species
identification works by comparing recordings of bat calls to a known
Species Classifier. To ensure greater accuracy, adjust the Classifier
Threshold Menu to +1 (Conservative) and select the Classifier Library
”Bats of Europe 5.4.0”. Use the default parameters for the remaining
settings. We will be using Maximum-Likelihood Estimate (MLE), a
statistical method that estimates the parameters of a model. In our
case, MLE will help us determine the presence or probable absence of
species at a specific location and time by using a classification
matrix. Local bat presence was determined by MLE and P-values (Britzke
et al., 2002).