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Field Guide to Amazonian Bats

Rhynchonycteris naso

Several techniques such as discriminant function analysis, as well as, more recently, the use of synergetic pattern recognition algorithms in real time and artificial neural networks, have been employed in species identification based on echolocation call data. However, in order to develop and successfully use these techniques, an accurate description of the characteristics of the echolocation calls of all species known to occur in the study area is paramount. In the end, even with the development of new algorithms and techniques for automatic call identification, manual cross-checking and revision of results by experts remain essential.

How and what to measure?

In order to use this key properly, it is essential to understand and standardize how measurements of calls are taken. Firstly, all measurements must be taken from the harmonic that concentrates most energy, which, although varying from family to family, is usually the first or the second. All harmonics will be integer multiples of the “fundamental� frequency (first harmonic).

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Field Guide to Amazonian Bats  

Do you think identifying bats in Europe or in North America is difficult? Well, try it in the Amazon The planet’s green lung is home to the...

Field Guide to Amazonian Bats  

Do you think identifying bats in Europe or in North America is difficult? Well, try it in the Amazon The planet’s green lung is home to the...

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