From mid-April through the end of May, the 2025 archive contains tentative Dickcissel night flight calls detected by two different automatic detectors at seven different monitoring stations. When first entering the archive, a calendar appears showing Dickcissel data from a single monitoring station (station name indicated at the beginning of page title) as automatically detected by the Nighthawk detector (detector name indicated in middle or end of page title). A date with an orange circle indicates that at least one tentative Dickcissel night flight call was detected that night (size of orange circle reflects the number of detections). Clicking on one of the orange circles in the calendar opens an album of the detections for that night at that station (Vesper refers to this as a "clip album"). The album shows a spectrogram for each detection: a visual representation of the sound energy with time on the horizontal axis, audio frequency on the vertical axis, and the loudness indicated by the level of darkness. To listen to a detection, move the mouse over the spectrogram and click the orange play button that appears in the upper left of the spectrogram.

All Dickcissel detections from Nighthawk are automatically classified as Dickcissel (DICK). These detections are periodically proof checked by human inspection and false positive Dickcissel detections reclassified as Noise. Evaluation of the Nighthawk detector at stations in the LRGV transect in 2024 indicated that it is very accurate for the Dickcissel in this region.

One can use the 3-lined-down-arrow to the right of the page title to access a menu for selecting the Dick-r detector data, which in spring migration is gathered simultaneously from the same digitized microphone feed as Nighthawk processes. Dick-r only detects calls from 9p-5a each night whereas in 2025 Nighthawk processes a Vesper Recorder audio file that runs from half an hour after sunset to 90 minutes before sunrise. The 3-lined down arrow menu also enables a user to navigate to see data from seven different stations and different species or Noise (false positives). The 2025 archive also contains Nighthawk detections of Upland Sandpiper (UPSA), Least Sandpiper (LESA), Black-and White Warbler (BAWW), Canada Warbler (CAWA), Grasshopper Sparrow (GRSP), along with the Dickcissel (DICK). Calls detected from all these species the previous night are usually posted to the archive by 9am CDT (GMT -5). Nighthawk does quite well identifying calls of some species migrating over southernmost Texas, but can produce a lot of false positives for others (e.g. Upland Sandpiper). Human proof checking of the calls automatically posted to the archive typically lags behind by a day or more. All graphic presentations of data within this website present data that has been proof checked.

Additional navigation instructions

A clip album is organized into pages, with each page containing the spectrograms of the next batch of detections in the night. Navigation through the pages of a clip album is possible using the two small arrow buttons to the right of the album's title, or by typing the "Shift" and "<" or ">" characters on the keyboard. Navigation is also possible by clicking on the temporal display of detections below the call album title  (darkening gray tones equal civil, nautical, and astronomical twilight respectively; dark is night). The numbers labeling the plot are hours of the night, and the plot contains a vertical mark for each detection. The marks for the calls of the page being displayed are magenta, and the marks of other clips are orange. One can navigate among the pages of a detection album by clicking on the plot. As one moves the mouse over the plot, the marks for the calls of the page under the mouse turn green and clicking the mouse leads to that page.