ISSS608 2017-18 T3 Assign Sun Shuangtian Kasios’ Recording Investigation

VAST 2018 Mini Challenge 1

Background

Data Selection

Migration Pattern

Kasios’ Recording Investigation

Conclusion

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Geospatial distribution of the recording

In our previous analysis, we could visualize the Rose-crested Blue Pipits in the Preserve appears mostly in northeast of the Preserve. Whereas according to the recordings provided by Kasios, Blue Pipits appears around the whole Preserve. This make us doubt the authenticity of the Blue Pipit recordings. Further analysis needs to be done to identify if the recording provided by Kasios are really the call of Blue Pipit.

Spectrogram in R

In the collection of bird calls from the Preserve which has accurate identifications, we randomly choose 4 Rose-crested Blue Pipit Song recordings and 4 Rose-crested Blue Pipit Call recordings. Then we use R package seewave to break the recording and detect the frequencies respectively.

Song frequency of Blue Pipit

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Call frequency of Blue Pipit

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Pattern Summary

From the spectrogram above We could conclude that he frequency of Blue Pipit songs and calls are both around 5KHz.