This value is used by the model to constrain the list of possible species that it will try to detect, given the minimum occurence frequency. A 0.05 threshold means that the species is seen on average at least 5% of the time, from historically collected data for your lat/lon. If you'd like to tinker with this value and see the species list output, you can run the following command AFTER clicking 'Update Settings' at the very bottom of this page to install the appropriate labels file: ~/BirdNET-Pi/birdnet/bin/python3 ~/BirdNET-Pi/scripts/species.py --threshold 0.05
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This value is used by the model to constrain the list of possible species that it will try to detect, given the minimum occurence frequency. A 0.05 threshold means that for a species to be included in this list, it needs to, on average, be seen on at least 5% of historically submitted eBird checklists for your given lat/lon/current week of year. So, the lower the threshold, the rarer the species it will include. If you'd like to tinker with this threshold value and see which species make it onto the list, you can run the following command AFTER clicking 'Update Settings' at the very bottom of this page to install the appropriate labels file: ~/BirdNET-Pi/birdnet/bin/python3 ~/BirdNET-Pi/scripts/species.py --threshold 0.05