Species
What the sources say about this taxon, as written.
behaviour · bio.acousti.ca
The song of Hexacentrus unicolor consists of short chirps (approximately 50—100ms long) presented in a rhythm of about 2Hz (1.6-3.3 Hz). One chirp consists of a crescendoing group of pulses, which follow one another with a frequency of 320-415 Hz. The variation is principally due to different ambient temperatures (22.5-28.5°C). The frequency spectrum shows two narrow maxima at 11 and 33 kHz and two submaxima at 22 and 44 kHz. Data known from studies of other bushcrickets (e.g. Busnel, Busnel & Dumortier, 1956) suggest that during one opening and closing sequence one chirp, comprising a group of pulses, is produced. However, recordings of the wing movements show that this is not the case in this species: with each cycle of movement only one pulse is created. Accordingly the frequency of the wing movements is very high (320-415 Hz, see above). The course of the stridulatory movement is shown in Fig. 2. Fig. 2A shows a long recording of the song, Fig. 2B gives a more detailed account of the generation of a chirp. Some time before the generation of sound, the elytra are moved with very high frequency; only after a short period of 'introductory swinging' does the crescendoing tone start. The pulses always emerge during the second half of the closing movement of the wings (Fig. 2C). At the end of a pulse group the wings remain in an opened position for some time. During the successive closure of the wings an isolated sound pulse is created. Throughout the song the animal is positioned in such a manner that its slightly opened elytra render the alae visible (see fig. 6 of Heller, 1983). The amplitude of the movement is very small and only a vibration is perceptible with the naked eye. An identical wing vibration can be recorded before the song. At this stage the movement is soundless, with almost the same rhythm, frequency and amplitude. The only difference from singing - except for the missing sound production - is that in most cases the elytra spring back without delay to the neutral position at the end of a chirp. The frequency of the wing beat during flight is, as expected, far lower: 22-23 Hz (also measured opto-electronically on two females at 26 °C).
this account at bio.acousti.ca
diagnostic · bio.acousti.ca
Stridulatory file with 46 teeth; moderately sulcate; teeth are almost of same length throughout the file except at distal end where it becomes narrow gradually, and abruptly narrow towards proximal end with few teeth.
11 measurements across 8 traits. Each name links to its term in the audioBlast vocabulary.
Every value behind the summaries above. Each links to its own record in the API, which carries the reference it was taken from.
| Trait | Value | Call | Part | Sex | Temp. | Source |
|---|---|---|---|---|---|---|
| Peak Frequency (kHz) | 11 | Calling Call | Male | bio.acousti.ca | ||
| 33 | Calling Call | Male | bio.acousti.ca | |||
| 22 | Calling Call | Male | bio.acousti.ca | |||
| 44 | Calling Call | Male | bio.acousti.ca | |||
| Number Of Teeth On Stridulatory File | 46 | Male | bio.acousti.ca | |||
| Crepitation (Presence) | Absent | Male; Female | bio.acousti.ca | |||
| Song Structure | Echemes | Calling Call | Male | bio.acousti.ca | ||
| Sound Production Method | Elytral stridulation (closing hemisyllable only) | Calling Call | Male | bio.acousti.ca | ||
| Echeme Repetition Rate (Hz) | 1.6-3.3 | Calling Call | Male | bio.acousti.ca | ||
| Syllable Repetition Rate (in echeme) (Hz) | 320-415 | Calling Call | Male | 22.5-28.5 | bio.acousti.ca | |
| Echeme Duration | 0.050-0.100 | Calling Call | Male | bio.acousti.ca |
81 in audioBlast.
69 more in the audioBlast browser.
Counts are recordings at or below each taxon, so an empty branch shows as empty before you click it. A dash means the join view holds no column for that rank and cannot roll up to it.
Publications audioBlast links to this taxon.
The rows audioBlast holds for this taxon, each matched to the same Catalogue of Life node. Where a source classifies it differently, its own classification is kept.
| Source | Its name | Its rank | Its family | Record |
|---|---|---|---|---|
| bio.acousti.ca | Hexacentrus unicolor | Species | Tettigoniidae | bio.acousti.ca/4852 |
| iNaturalist | Hexacentrus unicolor | Species | Tettigoniidae | iNaturalist/542504 |
Bioschemas is in the head of this page. The Darwin Core RDF lives at the API address below, which negotiates JSON-LD and Turtle.
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