LRGV Nocturnal Bird Migration Study

Spring 2025 nightly Dickcissel calls (red) tallied from six acoustic monitoring stations in the LRGV transect overlaid on the spring 2024 results (green/yellow) for the same six stations. Similar to 2024, each station uses an Old Bird 21c (v2020) microphone to receive sound from the night sky and the audio signal is fed to a Dell Latitude (7200 series) laptop to record and process the sound. The 2025 Dickcissel night flight call data shown were collected through automatic detection by "Dick-r" software operating 8 hours per night (9p-5a CDT, GMT -5). The 2024 data were extracted with "Dick-r" (yellow line) and "Nighthawk 3.0" (green line) over the same span of night across the same transect of seven acoustic stations as in 2025. 

Dickcissel detections will soon be copied to a searchable archive in the cloud. This will come online in late April and allow users to browse spectrograms and listen to detected calls from the previous evening and earlier in the season. The link below will access the 2025 archive. Follow the instructions below the link to navigate in the archive.



 

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