guys can anyone give us the latest state of art that has been used for the challenge?
Two of the best resources that you should consult are two of the past working notes. This one by Jan Schlüter: http://ceur-ws.org/Vol-2125/paper_181.pdf (does also have a repository online) and last year’s winning approach by Mario Lasseck: http://ceur-ws.org/Vol-2380/paper_86.pdf
We also have a baseline repository for the 2018 BirdCLEF edition online at: https://github.com/kahst/BirdCLEF-Baseline
If you’re interested in bird sound recognition in general, you could take a look at BirdNET, my dissertation project: https://monarch.qucosa.de/api/qucosa%3A36986/attachment/ATT-0/
There’s also a repository for that: https://github.com/kahst/BirdNET
Let me know if you need any more info or help.