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The Voices of the High-Andean Metriopelia Ground-Doves

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The Voices of the High-Andean Metriopelia Ground-Doves ORNITOLOGIA NEOTROPICAL 22: 219–227, 2011 © The Neotropical Ornithological Society THE VOICES OF THE HIGH-ANDEAN METRIOPELIA GROUND-DOVES Juan I. Areta1,2,3 & Diego Monteleone2,3 1CICyTTP-CONICET, Materi y España, 3105 Diamante, Entre Ríos, Argentina. E-mail: [email protected] 2Grupo FALCO, Calle 53 Nº 620 e/7 y 8, 1900 La Plata, Buenos Aires, Argentina. 3Aves Argentinas/Asociación Ornitológica del Plata, Matheu 1246/8 (C1249 AA B), Capital Federal, Argentina. Resumen. – Las voces de las palomitas altoandinas Metriopelia. – Las cuatro especies actualmente reconocidas de Metriopelia han sido frecuentemente consideradas mudas. De las cuatro especies, Palo- mita Cordillerana (M. melanoptera), Palomita Dorada (M. aymara), Palomita Moteada (M. ceciliae), y Palomita Ojo Desnudo (M. morenoi) sólo ha sido grabado el canto de M. melanoptera. Presentamos la primera evidencia de producción vocal en M. ceciliae y M. morenoi, y comentamos sobre la presencia de vocalizaciones en M. aymara. Todas las Metriopelia vocalizan. Sus características acústicas altamente inusuales para palomas Neotropicales (modulación rápida de frecuencia, banda ancha y frecuencia fun- damental alta) pueden estar vinculadas a los ambientes yermos que habitan. Los datos de nidificación, plumaje y vocalizaciones son consistentes con tratamientos taxonómicos previos ubicando a M. ceciliae y M. morenoi en el género Gymnopelia. Abstract. – The four currently recognized species of Metriopelia ground-doves, Black-winged Ground- Dove (M. melanoptera), Golden-spotted Ground-Dove (M. aymara), Bare-faced Ground-Dove (M. cecil- iae), and Bare-eyed Ground-Dove (M. morenoi) have frequently been considered silent. So far, vocaliza- tions have been recorded only for M. melanoptera. We provide the first evidence of vocal sound production in M. ceciliae and M. morenoi, and comment on the presence of vocalizations in M. aymara. All Metriopelia species vocalize. Their very unusual acoustic features for Neotropical doves (rapid fre- quency modulation, broad-band, and high emphasized frequency) can be easily linked to the barren environments they inhabit. Nesting, plumage, and vocal data is consistent with former taxonomic treat- ments placing M. ceciliae and M. morenoi in the genus Gymnopelia. Accepted 12 April 2011. Key words: Acoustic adaptation, high Andes, communication, Gymnopelia, Leptophaps, Metriopelia, voices. INTRODUCTION detected through their noisy wingbeats when flushed. Of the four species, the song has The high-Andean Metriopelia doves, Black- been tape-recorded only for the wide ranging winged Ground-Dove (M. melanoptera), M. melanoptera (Hardy et al. 1989, Fjeldså & Golden-spotted Ground-Dove (M. aymara), Krabbe 1990). Although closely related to Bare-faced Ground-Dove (M. ceciliae), and Columbina spp. (Peters 1937, Goodwin 1957, Bare-eyed Ground-Dove (M. morenoi) are Pereira et al. 2007), which are known for their mostly silent dwellers of rocky areas, usually conspicuous voices, members of Metriopelia 219 ARETA & MONTELEONE are not as vocal and have frequently been In this contribution, we present the first considered silent (Fjeldså & Krabbe 1990, evidence of vocal sounds by both M. ceciliae Jaramillo 2003). and M. morenoi, discuss the differences with Although all four species are currently the vocalizations of M. melanoptera, and men- included in the genus Metriopelia (Peters 1937; tion the presence of vocalizations in M. Goodwin 1959, 1983; Remsen et al. 2010) dif- aymara. We discuss possible explanations for ferent taxonomic groupings have been pro- their remarkable acoustic features, and the posed. The differences in shape, plumage, taxonomic implications of the differences in and bare parts led to their treatment in three their vocalizations. separate genera comprising Metriopelia melan- optera, Leptophaps aymara, Gymnopelia ceciliae, METHODS and G. morenoi (Hellmayr & Conover 1942); however, in a two-genera treatment, the two We obtained recordings of three of the four Gymnopelia species were kept together while species of Metriopelia ground-doves in differ- M. melanoptera and M. aymara were grouped in ent localities in Argentina (all our recordings a reduced genus Metriopelia (Salvadori 1893) are described in Results). JIA recorded M. based on their pointed wings, black tail, and morenoi with a Telinga Universal Parabola, wing adornments (white shoulders in melan- Sennheiser ME-62 microphone and Marantz optera, chestnut flight-feather barbs and PMD-222 tape recorder, and a Canon S3IS golden spots in aymara). video camera, and M. melanoptera with a Geographic variation is poorly under- Senn-heiser ME-67 microphone and Marantz stood in the genus, with M. melanoptera rang- PMD-222 tape recorder, and a Telinga ing from the northern to the southern Andes Universal Parabola and a Marantz PMD- (ssp. melanoptera in Peru, Bolivia, Chile and 661 recorder. DM recorded M. ceciliae with a Argentina, ssp. saturatior in Ecuador and Sennheiser ME-66 microphone and Sony Colombia), and the monotypic M. aymara TCM-5000EV tape recorder. All our ranging from Peru to Argentina (Hellmayr & recordings were deposited in the Macaulay Conover 1942). Both “Gymnopelia” species Library of Natural Sounds, Ithaca, New York. (M. morenoi and M. ceciliae) are characterized by Sound features were quantified by measure- a large naked area around the eyes, short ment of MAX = maximum frequency, MIN rounded wings, and white-tipped tails (Good- = minimum frequency, ENF = emphasized win 1959, Baptista et al. 1997, Areta 2010), frequency, BAND = bandwith based on spec- and are considered sister species (Johnson trograms in Figures 1–3, and obtained with 2004). Metriopelia ceciliae ranges from Peru Raven Pro 1.3 (Cornell Lab of Ornithology, to northern Argentina and is considered Bioacoustics Research Program) using win- polytypic (ssp. ceciliae and obsoleta in Peru, and dow size 1024, hop 512, overlap 50, Nyquist gymnops in southern Peru, northern Chile, frequency = 22,050 kHz, and sampling = 16 Bolivia, and northwest Argentina) (Hellmayr bits. Spectrograms shown were built using & Conover 1942, Narosky 1988, Abadie Syrinx 2.6h (John Burt, www.syrinxpc.com). 1991, Mazar Barnett et al. 1998, Pearman We obtained body mass data for M. melan- 2001); whilst the monotypic M. morenoi is optera, M. aymara, and M. ceciliae from Dunning endemic to northwest Argentina with no (2008), and from Camperi & Darrieu (2004) known geographic overlap with M. ceciliae for M. morenoi. Data on spectral features and (Sharpe 1902, Dinelli 1929, Zotta 1944, weight were tabulated to allow for a compari- Haene 1996, Areta 2010). son with data presented in Tubaro & Mahler 220 BIOACOUSTICS OF METRIOPELIA GROUND-DOVES FIG. 1. Spectrogram of the “cooing” of the Bare-faced Ground-Dove (Metriopelia ceciliae gymnops). Recorded by DM on 9 September 2004, Yavi, Jujuy, Argentina. (1998). We revised the on-line sound data- viduals that were apparently disputing a bases of Xeno-Canto (www.xeno-canto.org) nesting site in a cliff along the Yavi river and the Macaulay Library of Natural Sounds (Monteleone 2008). We later noticed that (http://macaulaylibrary.org). some dove voices were also tape-recorded inadvertently in this cut, presumably RESULTS corresponding to M. ceciliae. This voice comprises a series of five similar ascending Bare-faced Ground-Dove (Metriopelia ceciliae). This and later abruptly descending double-sound- dove has been considered silent in the main- ing cooing notes which became progressively stream literature (Fjeldså & Krabbe 1990, more spaced “cUup cUup cUup cUup cUup ” Jaramillo 2003, Schulenberg et al. 2007) except fading towards the end (Fig. 1, Table 1). for the report by Gifford (1941) who men- These voices probably do not belong to the tioned the existence of vocalizations in cap- individuals which were initially recorded tive-breeding birds: “In perching and cooing fighting. Gymnopelia rises and lowers the tail slightly On 26 October 2008, in the town of Putre without spreading it. Indeed, in the mating (I Región, Chile), JIA heard an individual season it keeps its tail in motion like a pipit. In uttering a series of four soft and low pitched doing this the tail is not moved far from a croaking notes “crrúac crrúac crrúac crrúac”, horizontal position.” (p. 242). However, he each note resembling the voice of the did not provide any description of this cooing. Croaking Ground-Dove (Columbina cruziana) More recently, Brooks (2010) mentioned that to the ear. The bird was sitting on the ground in captive birds “A vocalization is often emit- with a group of six other individuals, but it ted when a male lands close to a female, per- could not be tape-recorded. The next day, an haps to initiate courtship. The sound is a attempt was made to tape-record the voices, descending series of approximately 5–9 rapid but the doves did not vocalize. B. Knapton (in staccattoed ‘hoots’, similar in pattern to the litt.) heard the doves singing regularly during ‘laughing’ vocalization in domesticated bar- the breeding season in this area and described bary doves (Streptopelia risoria)” (p. 50). This the sound as “a Wo ow sound, like a growling report presumably belongs to the nominate wow, but with two syllables” adding that “it subspecies. sounded like Croaking Ground Doves.” All On 9 September 2004, in the town of Yavi these reports on vocalizations presumably (Jujuy, Argentina), DM recorded the mechani- belong to subspecies gymnops (Hellmayr & cal (flapping) sounds produced by two indi- Conover 1942). 221 ARETA & MONTELEONE TABLE 1. Frequency measurements and body mass of all Metriopelia ground-doves based on spectrograms of recordings illustrated in Figs 1–3. MAX = maximum frequency, MIN = minimum frequency, ENF = emphasized frequency, and BAND = bandwidth. MAX (Hz) MIN (Hz) ENF (Hz) BAND (Hz) Body mass (g) Metriopelia ceciliae 55,1 Cooing 779 260 560 519 Metriopelia morenoi 58 High cooing 7743 640 905 7103 Low cooing 1218 314 388 904 Bark 1005 694 311 861 Wreeeg call 8548 632 818 7916 Metriopelia aymara ND ND ND ND 61,8 Metriopelia melanoptera 100 Song 2447 1223 1636 1224 Piú call 3238 1133 2860 2105 Bare-eyed Ground-Dove (Metriopelia morenoi). ate any answer from the doves.
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