From mid-April through the end of May, the archive contains tentative Dickcissel night flght calls detected by two different automatic detectors at seven different monitoring stations. When first entering the archive, a calendar appears showing data for a single monitoring station (station name indicated at the beginning of page title) and from the Nighthawk 0.3.0 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 by Nighthawk are automatically classified as Dickcissel (DICK). These detections are periodically proof checked by human inspection and non-Dickcissel detections reclassified as Noise.

Nighthawk 0.3.0  is the default detector data that appears when first opening the archive. One can use the 3-lined down arrow right of the page title to access a menu for selecting the Dick-r detector data, which was gathered simultaneously from the same digitized sound stream. 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 detections). The Dickcissel is the only species with identified clips in the archive before June 3. Beginning June 3, tentative detections from Nighthawk 0.3.0 of Black-and White Warbler (BAWW), Least Sandpiper (LESA) night flight calls are also included in the archive. Upland Sandpiper was included for most of June, but Nighthawk produced too many false detections so it was discontinued from includsion in the archive. Detections that were incorrectly identified by Nighthawk have been manually corrected through the night of: Jun 29-30.

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.