El Cuco-Hormiguero Franjeado Neomorphus radiolosus es un ave rara, con problemas de conservación y cuya información sobre comportamiento y biología es deficiente. Cualquier dato adicional en este aspecto representa un instrumento importante para su conservación. Presentamos nuevos datos sobre su compartamiento en base a individuos observados en la Estación Biológica Jatun Sacha Bilsa, Esmeraldas, Ecuador, y la Reserva El Pangan, Nariño, Colombia

Berg, Karl S.

López-Lanús, Bernabé

Salaman, Paul G. W.

Strewe, Ralf

English

Scholarworks@UTRGV Univ. of Texas RioGrande Valley

University of Texas Rio Grande Valley ScholarWorks @ UTRGV Biology Faculty Publications and Presentations College of Sciences 1999 The ecology and vocalisations of Banded Ground-Cuckoo Neomorphus radiolosus Bernabé López-Lanús Karl S. Berg The University of Texas Rio Grande Valley, karl.berg@utrgv.edu Ralf Strewe Paul G. W. Salaman Follow this and additional works at: https://scholarworks.utrgv.edu/bio_fac  Part of the Biology Commons Recommended Citation López-Lanús, Bernabé, Karl S. Berg, Ralf Strewe, and Paul G. W. Salaman. 1999. “The Ecology and Vocalisations of Banded Ground-Cuckoo Neomorphus Radiolosus.” Cotinga 11: 42–45. This Article is brought to you for free and open access by the College of Sciences at ScholarWorks @ UTRGV. It has been accepted for inclusion in Biology Faculty Publications and Presentations by an authorized administrator of ScholarWorks @ UTRGV. For more information, please contact justin.white@utrgv.edu, william.flores01@utrgv.edu. Cotinga 11T h e  e c o l o g y  a n d  v o c a l i s a t i o n s  o f  B a n d e d  G r o u n d - Cu c k o o  N e o m o r p h u s  r a d io lo s u sBernabé López-Lanús, Karl S. Berg, Ralf Strewe and Paul G. W . SalamanC o t i n g a  1 1  ( 1 9 9 9 ) :  4 2 – 4 5El Cuco-Hormiguero Franjeado Neomorphus radiolosus es un ave rara, con problemas de conservación y cuya información sobre comportamiento y biología es deficiente. Cualquier dato adicional en este aspecto representa un instrumento importante para su conservación. Presentamos nuevos datos sobre su compartamiento en base a individuos observados en la Estación Biológica Jatun Sacha Bilsa, Esmeraldas, Ecuador, y la Reserva El Pangan, Nariño, Colombia.I n t r o d u c t i o nBanded Ground-cuckoo Neomorphus radiolosus is endemic to the Pacific slope of the Andes in south­west Colombia and north-west Ecuador. Within this highly restricted range, it is regarded as rare and local5, based on a very small number of records1,5,7 and assigned Vulnerable Red Data Book status1,2,3 owing to this paucity of records, endemic status and lack of any biological information on the species. Until 1992, there were only three confirmed records of the species in Colombia since 1956, and only one confirmed record in Ecuador since 19361. Given this almost complete lack of knowledge, any new infor­m ation on the species’ ecology is vital for conservation and management plans.Neomorphus radiolosus was observed for the first time in Estación Biológica Jatun Sacha Bilsa in the Mache-Chindul hills of north-west Ecuador (00°22'N 79°45'W) on 6 and 15 September 19966. In February 1998, BLL and KSB visited the reserve again and found N. radiolosus with relative ease following recognition of the species’ vocalisations, which are described here, together with field notes on behaviour and number of individuals observed. During 1997, RS visited the newly established na­ture reserve “El Pangan” in Nariño, south-west Colombia and, with ease, observed the species on each of three short visits to the site.4 2Figure 1. Map o f Ecuador and adjacent Colombia showing the position o f locations mentioned in the text.Cotinga 11 T h e  e c o l o g y  a n d  v o c a l i s a t i o n s  o f  B a n d e d  G r o u n d - C u c k o oN o t e s  o n  N eo m o rp h u s rad io losu s  f r o m  E c u a d o rOn 8 February 1998, BLL observed one bird for an hour (from 13h00) within a mixed-species flock for­aging at an army ant swarm. The observation took place 400 m inside an extensive area of primary forest, with a narrow understorey vegetation strata. The foraging flock was principally composed of Ocellated Antbird Phaenostictus mcleannani, and to a lesser extent Plain-brown Woodcreeper Dendrocincla fuliginosa, Immaculate Antbird Myrmeciza immaculata and Bicolored Antbird Gymnopithys leucaspis.On 18–20 February 1998, BLL and KSB encoun­tered an individual vocalising in an area of secondary forest within extensive primary forest. The behaviour of this bird was different from that in the first observation, it being less concerned by the observers’ presence and, if disturbed, would leave and then quickly return when it perceived no threat. This individual was quite confiding, although it was perhaps an immature without experience. It did not correspond to the description of adults, as the barring on the underparts and back was ochraceous and not white (except on parts of the breast). The bluish sheen of the head and the adult collar was absent, while the typically sky-blue ocu­lar patch was greyish (post-ocular) and sky-blue (pre-ocular). When motionless the birds’ plumage served as an excellent camouflage. However, the brilliant blue ocular area draws attention, especially as this bare skin can be expanded and contracted. It has been noted by Sick9 th a t some Thamnophilidae with bare, brightly coloured ocu­lar areas can also vary their size, this having some possible signaling function.This Neomorphus spent the entire time in this small secondary forest patch foraging for arthro­pods and occasionally made short, very fast sprints which were so sudden and ended so abruptly they made following the bird very difficult. These short sudden sprints startled nearby Ocellated Antbirds, but it was difficult to determine if this behaviour was an intrinsic element in its feeding strategy or was designed to distract and eliminate competitors such as Formicaridae. The bird would normally stand on the ground or perch on fallen logs. Forag­ing consisted of scouring live leaves and stems of the understorey, as well as examining tree trunk bases from the ground. The bird would stand sta­tionary, with only the crest rising and falling in a rhythmical manner. When it sighted prey, it would quickly run forward to capture it. When it consecu­tively caught prey items, it immediately performed an excited zig-zag running pattern that kicked up dead leaves. On five occasions, this individual was found at the same site, usually perched on several logs which it appeared to use as favoured viewpoints. Three days after this observation, BLL encountered and observed for 75 minutes a group of c. 50 pecca­ries Tayassu spp. at the same site, without encoun­tering the Neomorphus.N o t e s  o n  N eo m o rp h u s rad io losu s  f r o m  C o l o m b i aIn Colombia, N. radiolosus has been known since 1956 only from three records in dptos. Valle (Alta Anchicaya, a t 600 m, in 1989) and Cauca (Munchique National Park in 1988)1. In dpto. Nariño, the species is well-known to local hunters (at least five hunters independently identified this species from a plate5) in primary forest at Patio beside the Río Ñambí (01°27'N 78°02'W, at 550 m)8. The indigenous Awá hunters called the species “correlona” (fast runner). Local hunters furnished further information on its behaviour, including its association with large groups of Collared Peccary Tayassu tajacu. They reported the species as fairly common (seen every few months), indicating that it may be localised (as searches at lower and higher elevations failed to locate it), but perhaps not un­common in suitable areas8.The first confirmed Colombian records since 1989 come from a recently established private re­serve El Pangan (named after Long-wattled Umbrellabird Cephalopterus penduliger) in west Nariño10. The reserve is situated on the slopes of the Río Ñambí valley, 10 km north of Junin, Municipio de Barbacoas (01°21'N 78°04'W). The re­serve protects an area of c. 1000 ha of primary forest along an altitudinal gradient from 620–1700 m.On 11 June 1997 Neomorphus was encountered during a two-day visit to the reserve by RS. At 16h30 an adult was closely observed following an army ant swarm, accompanied by Esmeraldas Antbird Sipia rosenbergi, Gymnopithys bicolor, Myrmeciza immaculata and Dendrocincla fuliginosa. Alarmed by RS, the bird jumped onto a horizontal branch 3 m above ground for several seconds, then flew to the other side of a small stream and into denser vegetation where it disappeared. The observation took place in the transition zone of extensive pri­mary forest with a 10- ha patch of 15-year-old secondary forest at 650 m.A second visit, on 19 September 1997 at 09h30, located Neomorphus just 400 m south-west of the previous locality. The habitat was, in comparison, undisturbed primary forest with a relatively open understorey, at 710 m. This bird was watched for 15 m inutes accompanying a foraging flock of Dendrocincla fuliginosa , Gymnopithys bicolor, Myrmeciza immaculata, Phaenostictus mcleannani and a pair of C hecker-throated Antwren Myrmotherula fulviventris, all associated with an army-ant swarm. A pair of adult Neomorphus joined the flock and foraged very actively, running and hopping on branches, roots or small bushes from0.5–1.0 m above the ground. Both birds snapped their bills frequently, but no other vocalisation was noted.4 3Cotinga 11 T h e  e c o l o g y  a n d  v o c a l i s a t i o n s  o f  B a n d e d  G r o u n d - C u c k o oOn 29 January 1998, a pair was located follow­ing an army ant swarm, in primary forest (780 m) just 500 m from the previous observation in Sep­tember (and were perhaps the same individuals). The birds reacted nervously to RS at a distance of 15 m and flew 4 m up into a tree, where they waited on a horizontal branch bill-snapping, and raising and lowering their crests, until RS retreated. All of these three observations of Neomorphus come from an area of less than 1 km2. Reliable observations of the species were also made by a local hunter 1 km outside El Pangan reserve at 1050 m (01°22'N 78°05'W).Patio, where local hunters reported the species8 as not uncommon, is just 10 km downriver along the Río Nambí from El Pangan reserve. Interest­ingly, campesinos called the species “Seinero” (running with the peccaries) as opposed to the in­digenous name “correlona”. The owners of the El Pangan reserve reportedly saw the species twice with groups of peccaries, and once found an indi­vidual surprisingly following a group of four cattle that had escaped from a farm and entered the for­est on an narrow path.V o c a l is a t io n sOn 18 February 1998, between 2-4 Neomorphus were heard calling and tape-recorded from 14h00– 15h30 in the secondary forest patch at Jatun Sacha Bilsa described above. Only two birds were heard calling simultaneously and vocalisations emanat­ing from a new direction may have merely reflected a bird rapidly changing location. The two individu­als alternated their vocalisations and increased the intensity slowly, before decreasing to near-silence. Each session lasted c. 4 minutes and the birds were separated by c. 80 m. BLL located one calling bird while it was interacting with another c. 15 m away. Fig. 2 presents a sonogram of N. radiolosus.The vocalisation of Neomorphus sounds like the deep moo of a cow, initially similar to Long-wattled Umbrellabird Cephalopterus penduliger (locally called “avetoro”, the bull bird) or Ruddy Quail-Dove Geotrygon montana. The song of Neomorphus has a frequency range of 300-380 Hz. Fig. 2 demonstrates that the song rises over c. 2 seconds from 300–320 Hz to 320–380 Hz, before falling to 320 Hz. Cephalopterus penduliger vocalisations are main­tained at 400–480 Hz (100 Hz higher) throughout, with no significant variation. Neomorphus repeated its call every c. 5 seconds, while Cephalopterus penduliger only pause for c. 2 seconds between calls.The birds were in a regenerating forest patch 3-5 m tall, with dense vines and a few mature trees. One individual continued calling as BLL approached to within 5 m, but then became silent. When play­back was used the bird responded but appeared cautious. Subsequent vocalisations could not be heard due to the onset of rain. During the followingtwo days, only one bird was heard very sporadically. KSB returned to the site on 22 occasions during February–October 1998 but made only a few audi­tory observations, although on one such occasion, the bird vocalising proved to be Geotrygon montana.The vocalisations described for N. radiolosus ap­pear typical of Neomorphus (N. Krabbe and R. S. Ridgely in litt; M. Lysinger pers. comm, to BLL), although acoustically this is the least known genus of the Cuculidae4. It was impossible to determine the type of vocalisation we recorded, but it may have been a territorial call or song.C o n s e r v a t i o nDespite knowledge of the species vocalisations and habits, and following repeated intensive searches of under storey foraging flocks and army ant swarms, it is apparent that N. radiolosus has a relatively low population density. It is further evident that the species depends on primary forest — while also seen foraging in secondary forest — as it rarely wanders far from vast tracks of undisturbed forest. Consid­ering its dependence on large areas of primary forest, current rapid and uncontrolled conversion of lowland wet forests to agriculture in the Ecuado­rian and Colombian Choco presents a very real and imminent threat to N. radiolosus. Furthermore, con­servation progress is ham pered by wholly inadequate and ineffective governmental protective measures of national parks in the region. Together with Plumbeous Forest-Falcon Micrastur plumbeus, Baudo Guan Penelope ortoni, and Cephalopterus penduliger, these four Chocóan endemics’ depend-Figure 2. Sonogram s o f Neomorphus radiolosus song re co rd e d  by BLL at Estación B io lóg ica Jatun Sacha Bilsa, Ecuador, 18 February 1998; p repared by N . K rabbe.4 4Cotinga 11 T h e  e c o l o g y  a n d  v o c a l i s a t i o n s  o f  B a n d e d  G r o u n d - C u c k o oence on extensive tracts of wet foothill primary for­est place them as one of the highest conservation concerns in the Americas. Future conservation strat­egies should concentrate on ecological studies of these key species and on developing a network of private protected areas in the foothills of Ecuador and Colombia.We hope that this new vocalisation description and the ecological information presented here will spur future observations in north-west Ecuador and south-west Colombia, thus uncovering natural his­tory information vitally needed to produce and implement conservation strategies for this little- known species.A c k n o w le d g e m e n t sWe are grateful to Niels Krabbe, Robert S. Ridgely and Mitch Lysinger for their reviews and valuable comments on the manuscript. N. Krabbe prepared the sonograms. Many thanks to Michael McColm (Director of Estación Biológica Jatum Sacha Bilsa), Jackson Tobar (Director of Reserva El Pangan ), and the extraordinary hospitality of all those people we met in Ecuador and Colombia.R e f e r e n c e s1. Collar, N. J., Gonzaga, L. P., Krabbe, N., MadroñoNieto, L. G., Naranjo, L. G., Parker, T. A. & Wege D. C. (1992) Threatened birds of the Americas: the ICBP/IUCN Red Data Book. Cambridge, UK: International Council for Bird Preserva­tion.2. Collar, N. J., Crosby, M. J. & Stattersfield, A. J.(1994) Birds to watch 2: the world list of threat­ened birds. Cambridge, UK: BirdLife Interna­tional (Conservation Series 4).3. Granizo, T., Guerrero, M., Pacheco, C., Phillips,R., Ribadeneira, M. B. & Suárez, L. (1997) Lista de aves amenazadas de extinción en el Ecua­dor. Quito: UICN-Sur, CECIA, INEFAN, EcoCiencia & BirdLife International.4. Hardy, J. W., George, B., Reynard, G. B., & Coffey,B. B. (1987) Voices of the New World cuckoos and trogons. Gainesville, Florida: ARA Records.5. Hilty, S. L. & Brown, W. L. (1986) A  guide to thebirds of Colombia. Princeton: Princeton Uni­versity Press.6. Hornbuckle, J. (1997) Two sightings of BandedGround-cuckoo Neomorphus radiolosus in Ec­uador. Cotinga 8: 90.7. Ridgely, R. S., Greenfield, P. J. & Guerrero G.(1998) Una lista anotada de las aves del Ecua­dor C ontinental. Quito: Fundación Ornitológica del Ecuador, CECIA.8. Salaman, P.G.W. (ed.) (1994) Surveys and con­servation of biodiversity in the Choco, south­west Colombia. Cambridge, UK: International Council for Bird Preservation (Study Report 61).9. Sick, H. (1993) Birds in Brazil. Princeton:Princeton University Press.10. Strewe, R. (in prep.) Bird surveys in ReservaNatural El Pangan, southwest Colombia.Bernabé López-Lanúsc/o Asociación Ornitológica del Plata, 25 de Mayo 749. Piso 2 “g”, 1002 Buenos Aires, Argentina. E-mail: bernabe@telearmenia.net.co.Karl S. BergPO. Box 09-01-7343, Guayaquil, Ecuador. E-mail: kberg@ucsg.edu.ec.R alf StreweIn stitu te  o f Biogeography, University of Saarbrücken, D-66041 Saarbrücken, Germany. E- mail: ralf.strewe@t-online.de.Paul G. W. SalamanEdward Grey Institute of Field Ornithology, Dept, of Zoology, University of Oxford. U.K. E-mail: salaman@proaxis.com.4 5

The ecology and vocalisations of Banded Ground-Cuckoo Neomorphus radiolosus

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The ecology and vocalisations of Banded Ground-Cuckoo Neomorphus radiolosus

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