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693 results for “vocalizations”
FIGURE 2 in Distribution, Vocalization And Taxonomic Status Of Hypsiboas Roraima And H. Angelicus (Amphibia: Anura: Hylidae)
FIGURE 2: Map of the western Guiana Shield, NE South America, with the distribution of Hypsiboas roraima in Guyana and Venezuela. The white square is the type locality, Roraima (NE slope section) in Guyana. White circles are 1: Mount Ayanganna; 2: Mount Wokomung; 3: La Escalera, Sierra de Lema (including different localities). The black square is the type locality of H. angelicus, Auyán-tepui, and contains all localities in and around Auyán-tepui.
FIGURE 3 in Distribution, Vocalization And Taxonomic Status Of Hypsiboas Roraima And H. Angelicus (Amphibia: Anura: Hylidae)
FIGURE 3: Vocalization of Hypsiboas roraima from Quebrada Rutapá, western piedmont of Auyán-tepui, 950 m. A: Spectrogram and waveform of a 2.2 seconds sequence of the call, showing eigth notes. B: Spectrogram and waveform of one second sequence of the call, showing three notes. Temperature of the air was 22°C.
FIGURE 4 in Distribution, Vocalization And Taxonomic Status Of Hypsiboas Roraima And H. Angelicus (Amphibia: Anura: Hylidae)
FIGURE 4: Cloacal region of two specimens of Hypsiboas roraima, showing variation in cloacal tubercles. A: male MHNLS 16085 from the Río Cucurital, similar in shape and disposition to EBRG 2733, the holotype of H. angelicus (compare with Fig. 24 in Myers & Donnelly, 2008). B: female MHNLS 19657, with less developed elongated tubercles.
FIGURE 1 in Distribution, Vocalization And Taxonomic Status Of Hypsiboas Roraima And H. Angelicus (Amphibia: Anura: Hylidae)
FIGURE 1: Hypsiboas roraima in life. A: adult female, MHNLS 19657 from El Peñón, southern slope of Auyán-tepui. B and D: adult female, MHNLS 19656 from La Laja, Sierra de Lema; photos by CLBA. C: subadult female, KU 181072 from La Escalera, km 112 El Dorado-Santa Elena de Uairén. Photo by W.E.D.
Fig. 1. A in Postnatal Growth and Vocalization Development in the Long-fingered Bat, Myotis capaccinii (Chiroptera, Vespertilionidae)
Fig. 1. A comparison between echolocation calls of an adult and newborn long-fingered bat, Myotis capaccinii. (a) Sonogram, showing calls composed of a frequency modulation (FM) component with a variable range of frequencies. (b) Power spectrogram, showing the dominant frequency of the call.
Fig. 4 in Postnatal Growth and Vocalization Development in the Long-fingered Bat, Myotis capaccinii (Chiroptera, Vespertilionidae)
Fig. 4. Positive associations between changes in the peak frequency and handwing area, armwing area and aspect ratio. Negative associations are illustrated between changes in the peak frequency and wing loading.
Fig. 3 in Postnatal Growth and Vocalization Development in the Long-fingered Bat, Myotis capaccinii (Chiroptera, Vespertilionidae)
Fig. 3. Positive associations between changes of the peak frequency of calls emitted by Myotis capaccinii infants with (a) forearm length, (b) body mass, (c) wing area and (d) wingspan from day 1-28.
Fig. 2 in Postnatal Growth and Vocalization Development in the Long-fingered Bat, Myotis capaccinii (Chiroptera, Vespertilionidae)
Fig. 2. Changes in the calls emitted by Myotis capaccinii infants during postnatal growth from day 1-16.
Fig. 5 in Postnatal Growth and Vocalization Development in the Long-fingered Bat, Myotis capaccinii (Chiroptera, Vespertilionidae)
Fig. 5. Recording calls by a mother-infant pair when the infant bat is separating from its mother and modes before and after separation from its mother. One to two harmonic calls with high-frequency in the before and after separation step belong to the mother and multiharmonic calls with low-frequency belong to the pup.
Data and code for: Discrimination between the facial gestures of vocalizing and non-vocalizing lemurs and small apes using deep learning.
<p>Data and code for: Discrimination between the facial gestures of vocalizing and non-vocalizing lemurs and small apes using deep learning</p>
Data from: Early development of vocal interaction rules in a duetting songbird
Exchange of vocal signals is an important aspect of animal communication. Although birdsong is the premier model for understanding vocal development, the development of vocal interaction rules in birds and possible parallels to humans have been little studied. Many tropical songbirds engage in complex engage in vocal interactions in the form of duets between mated pairs. In some species duets show precise temporal coordination and follow rules (duet codes) governing which song type one bird uses to reply to each of the song types of its mate. We determined whether these duetting rules are acquired during early development in canebrake wrens. Results show that juveniles acquire a duet code by singing with a mated pair of adults and that juveniles gradually increase their fidelity to the code over time. Additionally, we found that juveniles exhibit poorer temporal coordination than adults and improve their coordination as time progresses. Human turn-taking, an analogous rule to temporal coordination, is learned during early development. We report that the ontogeny of vocal interaction rules in songbirds is analogous to that of human conversation rules.
Data from: Acoustic stability in hyrax snorts: vocal tightrope-walkers or wrathful verbal assailants?
The source-filter theory proposes that information on caller properties is communicated through acoustic qualities, as physical state and performance ability are reflected in the voice. Vocal stability, manifested through harshness is especially intriguing, and has rarely been explored although harsh sounds are prevalent in nature. Male rock hyraxes (Procavia capensis) produce loud complex calls that we term songs. Only the calls of older, socially dominant males, include a harsh sound termed snort. As snorts are the rarest element in songs, we hypothesized that high quality snorts are difficult to produce, and that their quality consists in the ability to maintain smoothness throughout this low-pitched, harsh call. We quantified harshness by measuring periodicity deviations and expected to find a link between social parameters (residence, rank, and weight) and the ability to produce longer, smoother snorts. In addition, we presumed that if calls are used as vocal contests, conspecifics would avoid answering songs that exhibit a higher acoustic ability than their own songs. We found that in wild hyrax songs, snort harshness was associated with both weight and social rank, but in opposite directions. Heavier males produced smoother snorts and higher ranked individuals produced harsher snorts, possibly indicating aggressiveness. Playback experiments showed that longer and harsher synthetic snorts, inserted into natural songs, reduced conspecific answer rates. Snorts may communicate complex information on hyrax weight and dominance by means of element length and harshness. Our present results provide a stimulating insight into the understanding of acoustics in mammalian vocal communication.
FIGURE 4 in The tadpole of Physalaemus soaresi Izecksohn, 1965 (Anura: Leptodactylidae), with comments on taxonomy, reproductive behavior, and vocalizations
FIGURE 4. Narrowband audiospectrograms (filter bandwidth 133.29 Hz) of the advertisement call of (A) Physalaemus soaresi, recorded at typelocality on 15 November 1997, air temperature 26oC, and (B) Physalaemus olfersii, recorded at Teresópolis, Rio de Janeiro State, on 12 October 1996, air temperature 15oC.
FIGURE 1 in The tadpole of Physalaemus soaresi Izecksohn, 1965 (Anura: Leptodactylidae), with comments on taxonomy, reproductive behavior, and vocalizations
FIGURE 1. Tadpole of Physalaemus soaresi, stage 33 (Gosner 1960). (A) Lateral view, (B) dorsal view, and (C) ventral view.
FIGURE 3 in The tadpole of Physalaemus soaresi Izecksohn, 1965 (Anura: Leptodactylidae), with comments on taxonomy, reproductive behavior, and vocalizations
FIGURE 3. Oscillograms with an expanded timebase to show three cycles of the amplitudemodulated waveform from the middle of the advertisement call of (A) Physalaemus soaresi, and (B) Physalaemus olfersii. The horizontal bar indicates the period of one cycle; notice the different time scales.
FIGURE 3 in Species limits in Antbirds (Aves: Passeriformes: Thamnophilidae): an evaluation of Plumbeous Antvireo (Dysithamnus plumbeus) based on vocalizations
FIGURE 3. Calls of Dysithamnus leucostictus and D. plumbeus. (A) Examples of common calls of D. leucostictus tucuyensis. Rancho Grande, Aragua, Venezuela (P. Schwartz ML 61928). (B) Variant of D. l. tucuyensis common call, same recording. (C–E) Representative examples of common calls of D. l. leucostictus. (C) Downslurred call (most prevalent). Volcán Sumaco, Napo, Ecuador (B. Whitney ML 50887). (D) Rounded call. Volcán Sumaco, Napo, Ecuador (B. Whitney ML 50883). (E) Upslurred call, same recording. (F) D. l. leucostictus Flat call. Volcán Sumaco, Napo, Ecuador (B. Whitney ML 51122). (G) D. l. tucuyensis Downslurred call. Colonia Tovar, Aragua, Venezuela (ISL-BMW.017:27). (H) D. l. leucostictus Short downslurred call. Volcán Sumaco, Napo, Ecuador (B. Whitney ML 51122). (I) D. l. tucuyensis Short downslurred call. Rancho Grande, Aragua, Venezuela (B. Whitney ISL-BMW.018:07). (J) D. l. tucuyensis Complex call to be verified (see text). Montalban, Carabobo Venezuela (P. Boesman ISL-MISC.G.044). (K–M) Representative examples of calls of D. plumbeus. (K) Simple calls. Parque Estadual Florestal do Rio Doce, Minas Gerais, Brazil (M. Maldonado-Coelho ISL-MISC.G.0038). (L) Harsh chirr, same recording. (M) Short trills. Parque Estadual Florestal do Rio Doce, Minas Gerais, Brazil (M. Maldonado-Coelho ISL-MISC.G.0039). Nomenclature follows recommendations of this paper.
FIGURE 2 in Species limits in Antbirds (Aves: Passeriformes: Thamnophilidae): an evaluation of Plumbeous Antvireo (Dysithamnus plumbeus) based on vocalizations
FIGURE 2. Male loudsongs of Dysithamnus leucostictus and D. plumbeus. (A) D. leucostictus tucuyensis Rancho Grande, Aragua, Venezuela (P. Schwartz ML 61928). (B) D. l. leucostictus Volcán Sumaco, Napo, Ecuador (B. Whitney ML 50883). (C) D. plumbeus Reserva Biológica de Sooretama, Espírito Santo, Brazil (B. Whitney ISL-BMW.201:46). Nomenclature follows recommendations of this paper.
FIGURE 1 in Species limits in Antbirds (Aves: Passeriformes: Thamnophilidae): an evaluation of Plumbeous Antvireo (Dysithamnus plumbeus) based on vocalizations
FIGURE 1. Geographic ranges. Locations documented by specimens, vocal recordings, or published sight records are assigned to geographic sectors (Isler 1997) and are identified by solid black circles. 1 = Dysithamnus leucostictus tucuyensis. 2 = D. l. leucostictus. 3 = D. plumbeus. Nomenclature follows recommendations of this paper.
Figure 6 in Vocalization and territorial behaviour of Phyllomedusa nordestina Caramaschi, 2006 (Anura: Hylidae) from southern Bahia, Brazil
Figure 6. Males of Phyllomedusa nordestina in physical combat. (A) Male on the back of its opponent; (B) male punching the opponent in the head region.
Figure 4 in Vocalization and territorial behaviour of Phyllomedusa nordestina Caramaschi, 2006 (Anura: Hylidae) from southern Bahia, Brazil
Figure 4. Oscillogram and sonogram of territorial call type I of Phyllomedusa nordestina. Recorded on 20 November 2007 at the Ecological Reserve of Michelin, Igrapiúna, Bahia.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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