802
Views
45
Downloads
2
Crossref
1
WoS
2
Scopus
0
CSCD
Knowledge of breeding success and its limiting factors is crucial in assessing species’ conservation needs. As cavity-nesters, parrots are particularly influenced by the availability of suitable cavities and low breeding output, whether due to natural processes or trapping. On the island of Sumba, Indonesia, the Critically Endangered Citron-crested Cockatoo (Cacatua citrinocristata) has the added problem of co-existing with an unusually rich hole-nesting bird community in a forested environment much constrained by habitat loss. We monitored 95 nesting cavities of cockatoos and their competitors and potential nest-predators, over one to four breeding seasons, using a combination of camera-traps, direct checks on nest contents, and observations from the ground. Competition for suitable cavities was intense among three large parrot species, two owls and a hornbill. Visitation rates by potential competitors were higher at unoccupied cavities than at those containing active nests, reflecting the guarding behaviour of the occupants. The Endangered Sumba Hornbill (Rhyticeros everetti) dominated observed direct confrontations and was the most frequent visitor to active parrot nests, suggesting a further role as a potential nest-predator. Cockatoos prospected many cavities but rarely then attempted to nest: instead the sites were usually occupied by other cavity-nesters, or by bees. At the few cavities where cockatoos did breed, predation pressure was likely low, and observed success rate high (10 successful of 15 nests), although the low number of nests found early in the breeding cycle suggests that some may have failed before detection. Intense competition for cavities suggests a shortage of suitable nest-sites, the need for preservation of old hole-bearing trees and a role for nestboxes. Accessible, known, safe artificial nest-sites would also provide opportunities to assess the scale of nest-site shortage, allow camera placements to study productivity, exclude some competitors and predators, and prevent illegal trapping. Especially given continued trapping pressure, the species would benefit from targeted local awareness-raising and law enforcement, with the whole endeavour backed up by longer-term forest restoration.
Knowledge of breeding success and its limiting factors is crucial in assessing species’ conservation needs. As cavity-nesters, parrots are particularly influenced by the availability of suitable cavities and low breeding output, whether due to natural processes or trapping. On the island of Sumba, Indonesia, the Critically Endangered Citron-crested Cockatoo (Cacatua citrinocristata) has the added problem of co-existing with an unusually rich hole-nesting bird community in a forested environment much constrained by habitat loss. We monitored 95 nesting cavities of cockatoos and their competitors and potential nest-predators, over one to four breeding seasons, using a combination of camera-traps, direct checks on nest contents, and observations from the ground. Competition for suitable cavities was intense among three large parrot species, two owls and a hornbill. Visitation rates by potential competitors were higher at unoccupied cavities than at those containing active nests, reflecting the guarding behaviour of the occupants. The Endangered Sumba Hornbill (Rhyticeros everetti) dominated observed direct confrontations and was the most frequent visitor to active parrot nests, suggesting a further role as a potential nest-predator. Cockatoos prospected many cavities but rarely then attempted to nest: instead the sites were usually occupied by other cavity-nesters, or by bees. At the few cavities where cockatoos did breed, predation pressure was likely low, and observed success rate high (10 successful of 15 nests), although the low number of nests found early in the breeding cycle suggests that some may have failed before detection. Intense competition for cavities suggests a shortage of suitable nest-sites, the need for preservation of old hole-bearing trees and a role for nestboxes. Accessible, known, safe artificial nest-sites would also provide opportunities to assess the scale of nest-site shortage, allow camera placements to study productivity, exclude some competitors and predators, and prevent illegal trapping. Especially given continued trapping pressure, the species would benefit from targeted local awareness-raising and law enforcement, with the whole endeavour backed up by longer-term forest restoration.
Altamirano, T.A., Ibarra, J.T., Martin, K., Bonacic, C., 2017. The conservation value of tree decay processes as a key driver structuring tree cavity nest webs in South American temperate rainforests. Biodivers. Conserv. 26, 2453-2472
Arendt, W.J., 2000. Impact of nest predators, competitors, and ectoparasites on Pearly-eyed Thrashers, with comments on the potential implications for Puerto Rican Parrot recovery. Ornitol. Neotrop. 11, 13-63
van Balen, J.H., Booy, C.J.H., van Franeker, J.A., Osieck, E.R., 1982. Studies on hole-nesting birds in natural nest sites. Ardea 70, 1-24
Bates, D., Machler, M., Bolker, B., Walker, S., 2015. Fitting linear mixed-effects models using lme4. J. Stat. Softw. 67, 1-48
Bonaparte, E.B., Cockle, K.L., 2017. Nest niche overlap among the endangered Vinaceous-breasted Parrot (Amazona vinacea) and sympatric cavity-using birds, mammals, and social insects in the subtropical Atlantic Forest, Argentina. Condor 119, 58-72
Brightsmith, D., Bravo, A., 2006. Ecology and management of nesting Blue-and-Yellow Macaws (Ara ararauna) in Mauritia Palm Swamps. Biodivers. Conserv. 15, 4271-4287
Brightsmith, D.J., 2005. Competition, predation and nest niche shifts among tropical cavity nesters: phylogeny and natural history evolution of parrots (Psittaciformes) and trogons (Trogoniformes). J. Avian Biol. 36, 64-73
Britt, C.R., Garcia Anleu, R., Desmond, M.J., 2014. Nest survival of a long-lived psittacid: Scarlet Macaws (Ara macao cyanoptera) in the Maya Biosphere Reserve of Guatemala and Chiquibul Forest of Belize. Condor 116, 265-276
Cahill, A.J., Walker, J.S.J.S., Marsden, S.J., 2006. Recovery within a population of the Critically Endangered citron-crested cockatoo Cacatua sulphurea citrinocristata in Indonesia after 10 years of international trade control. Oryx 40, 161-167
Chen, J.-N., Liu, N.-F., Yan, C., An, B., 2011. Plasticity in nest site selection of Black Redstart (Phoenicurus ochruros): a response to human disturbance. J Ornithol. 152, 603-608
Clout, M.N., Merton, D.V., 1998. Saving the kakapo: the conservation of the world’s most peculiar parrot. Bird. Conserv. Int. 8, 281-296
Cockle, K.L., Martin, K., Drever, M.C., 2010. Supply of tree-holes limits nest density of cavity-nesting birds in primary and logged subtropical Atlantic forest. Biol. Conserv. 143, 2851-2857
Collar, N.J., Eaton, J.A., Sykes, B., 2017. Conservation and the redaction of locality data. BirdingASIA 28, 3-4
Collar, N.J, Marsden, S.J., 2014. The subspecies of Yellow-crested Cockatoo Cacatua sulphurea. Forktail 23, 7
Collias, N.E., 1964. The evolution of nests and nest-building in birds. Am. Zool. 4, 175-190
Danchin, E., Wagner, R.H., 1997. The evolution of coloniality: the emergence of new perspectives. Trends Ecol. Evol. 12, 342-347
Delany, M.E., Tell, L.A., Millam, J.R., Preisler, D.M., 1999. Photographic candling analysis of the embryonic development of orange-winged amazon parrots (Amazona amazonica). J. Avian Med. Surg. 13, 116-123
Eggers, S., Griesser, M., Nystrand, M., Ekman, J., 2005. Predation risk induces changes in nest-site selection and clutch size in the Siberian jay. Proc. R. Soc. B. Biol. Sci. 273, 701-706
Gonzalez, J.A., 2003. Harvesting, local trade, and conservation of parrots in the Northeastern Peruvian Amazon. Biol. Conserv. 114, 437-446
Gutzat. F., Dormann, C.F., 2018. Decaying trees improve nesting opportunities for cavity-nesting birds in temperate and boreal forests: A meta-analysis and implications for retention forestry. Ecol. Evol. 8, 8616-8626
Harper, G.A., Bunbury, N., 2015. Invasive rats on tropical islands: Their population biology and impacts on native species. Glob. Ecol. Conserv. 3, 607-627
Heinsohn, R., Legge, S., 2003. Breeding biology of the reverse-dichromatic, co-operative parrot Eclectus roratus. J. Zool. 259, 197-208
Heinsohn, R., Murphy, S., Legge, S., 2003. Overlap and competition for nest holes among eclectus parrots, palm cockatoos and sulphur-crested cockatoos. Aust. J. Zool. 51, 81-94
Heinsohn, R., Zeriga, T., Murphy, S., Igag, P., Legge, S., Mack, A.L., 2009. Do Palm Cockatoos (Probosciger aterrimus) have long enough lifespans to support their low reproductive success? Emu 109, 183-191
Heinsohn, T.E., 2003. Animal translocation: long-term human influences on the vertebrate zoogeography of Australasia (natural dispersal versus ethnophoresy). Zoologist 32, 351-376
Hidayat, O., Kayat, K., 2020. Pendekatan preferensi habitat dalam penyusunan strategi konservasi in situ Kakatua Sumba (Cacatua sulphurea citrinocristata, Fraser 1844). J. Penelit. Hutan dan Konserv. Alam.;17, 113-126
van der Hoek, Y., Gaona, G.V., Martin, K., 2017. The diversity, distribution and conservation status of the tree-cavity-nesting birds of the world. Divers. Distrib. 23,1120-1131
Howald, G., Donlan, C.J., Galvan, J.P., Russell, J.C., Parkes, J., Samaniego, A., et al., 2007. Invasive rodent eradication on islands. Conserv. Biol. 21, 1258-1268
Igag, P., Mack, A.L., Legge, S., Heinsohn, R., 2019. Breeding biology of three large, sympatric rainforest parrots in New Guinea: Palm Cockatoo, Pesquet’s Parrot and Eclectus Parrot. Emu 119, 196-204
Ihsannudin, I., Hidayat, K., Sukesi, K., Yuliati, Y., 2020. Perception of the local community toward the yellow-crested cockatoo (Cacatua sulphurea abbotti), a critically endangered species in Masakambing Island, Indonesia. Geografia 16, 1-14
Imansyah, M.J., Purwandana, D., Ariefiandy, A., Benu, Y.J., Jessop, T.S., Trainor, C.R., 2016. Valley-floor censuses of the Critically Endangered Yellow-crested Cockatoo Cacatua sulphurea occidentalis on Komodo Island, East Nusa Tenggara province, Indonesia, point to a steep population decline over a six-year period. Forktail 32, 66-72
Indraswari, K., Friedman, R.S., Noske, R., Shepherd, C.R., Biggs, D., Susilawati C., et al., 2020. It’s in the news: Characterising Indonesia’s wild bird trade network from media-reported seizure incidents. Biol. Conserv. 243, 108431
Jones, M.J., Linsley, M.D., Marsden, S.J., 1995. Population sizes, status and habitat associations of the restricted-range bird species of Sumba, Indonesia. Bird Conserv. Int. 5, 21-52
Kaisin, O., Gazagne, E., Savini, T., Huynen, M.-C., Brotcorne, F., 2018. Foraging strategies underlying bird egg predation by macaques: A study using artificial nests. Am. J. Primatol. 80, e22916
Karande, A.A., 1967. Timber, Tetrameles nudiflora R., resistant to teredid borers in Bombay Harbour. Nature 213, 105
Koenig, S.E., Wunderle, J.M., Enkerlin-Hoeflich, E.C., 2007. Vines and canopy contact: A route for snake predation on parrot nests. Bird Conserv. Int. 17, 79-91
Linhart, P., Fuchs, R., Polakova, S., Slabbekoorn, H., 2012. Once bitten twice shy: long-term behavioural changes caused by trapping experience in willow warblers Phylloscopus trochilus. J. Avian Biol. 43, 186-192
Loong, S., Sin, Y.C.K., Johns, P., Plowden, T., Yong, D.L., Lee, J., et al., 2021. Nest predation by Oriental Pied Hornbills Anthracoceros albirostris in urban Singapore. BirdingASIA 35, 86-91
Marini, M.A., Melo, C., 1998. Predators of quail eggs, and the evidence of the remains: Implications for nest predation studies. Condor 100, 395-399
Marsden, S.J., Jones, M.J., 1997. The nesting requirements of the parrots and hornbill of Sumba, Indonesia. Biol. Conserv. 82, 279-287
Martin, R.O., Perrin, M.R., Boyes, R.S., Abebe, Y.D., Annorbah, N.D., Asamoah, A., et al., 2014. Research and conservation of the larger parrots of Africa and Madagascar: a review of knowledge gaps and opportunities. Ostrich 85, 205-233
Masello, J.F., Pagnossin, M.L., Sommer, C., Quillfeldt, P., 2006. Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: The Burrowing Parrots of the north-eastern Patagonian coastal cliffs. Emu 106, 69-79
Masello, J.F., Quillfeldt, P., 2002. Chick growth and breeding success of the Burrowing Parrot. Condor 104, 574-586
Matuzak, G.D., Brightsmith, D.J., 2007. Roosting of Yellow-naped Parrots in Costa Rica: estimating the size and recruitment of threatened populations. J. Field Ornithol. 78, 159-169
Monterrubio, T., Enkerlin-Hoeflich, E., Hamilton, R.B., 2002. Productivity and nesting success of Thick-billed Parrots. Condor 104, 788-794
Moorhouse, R., Greene, T., Dilks, P., Powlesland, R., Moran, L., Taylor, G., et al., 2003. Control of introduced mammalian predators improves kaka Nestor meridionalis breeding success: reversing the decline of a threatened New Zealand parrot. Biol. Conserv. 110, 33-44
Murphy, S., Legge, S., Heinsohn, R., 2003. The breeding biology of palm cockatoos (Probosciger aterrimus): A case of a slow life history. J. Zool. 261, 327-339
Nandika, D., Agustina, D., 2012. Few and far between. Saving the Yellow-crested Cockatoos. PsittaScene 24, 130-134
Nandika, D., Mulyani, Y.A., Prawiradilaga, D.M., Agustina, D., 2020. Monitoring of Cacatua sulphurea abbotti in Masakambing Island, Indonesia. Biotropia Southeast Asian J. Trop. Biol. 27, 271-281
Newton, I., 1994. The role of nest sites in limiting the numbers of hole-nesting birds: A review. Biol. Conserv. 70, 265-276
Nilsson, S.G., 1986. Evolution of hole-nesting in birds: on balancing selection pressures. Auk 103, 432-435
Olah, G., Butchart, S.H.M., Symes, A., Guzman, I.M., Cunningham, R., Brightsmith, D.J., et al., 2016. Ecological and socio-economic factors affecting extinction risk in parrots. Biodivers. Conserv. 25, 205-223
Pierce, A.J., Pobprasert, K., 2013. Nest predators of southeast Asian evergreen forest birds identified through continuous video recording. Ibis 155, 419-423
Pires, S.F., 2012. The illegal parrot trade: a literature review. Glob. Crime. 13, 176-190
Pires, S.F., Olah, G., Nandika, D., Agustina, D., Heinsohn, R., 2021. What drives the illegal parrot trade? Applying a criminological model to market and seizure data in Indonesia. Biol. Conserv. 257, 109098
Renton, K., 2004. Agonistic interactions of nesting and nonbreeding macaws. Condor 106, 354-362
Reuleaux, A., Richards, H., Payet, T., Villard, P., Waltert, M., Bunbury, N., 2014. Breeding ecology of the Seychelles Black Parrot Coracopsis barklyi. Ostrich 85, 255-265
Reuleaux, A., Siregar, B.A., Collar, N.J., Panggur, M.R., Mardiastuti, A., Jones, M.J., et al., 2020. Protected by dragons: Density surface modeling confirms large population of the critically endangered Yellow-crested Cockatoo on Komodo Island. Condor 122, duaa042
Ribeiro-Silva, L., Perrella, D.F., Biagolini, Jr., C.H., Zima, P.V.Q., Piratelli, A.J., Schlindwein, M.N., et al., 2018. Testing camera traps as a potential tool for detecting nest predation of birds in a tropical rainforest environment. Zoologia 35, 1-8
Richardson, T.W., Gardali, T., Jenkins, S.H., 2009. Review and meta-analysis of camera effects on avian nest success. J. Wildl. Manage. 73, 287-293
Rolland, C., Danchin, E., de Fraipont, M., 1998. The evolution of coloniality in birds in relation to food, habitat, predation, and life-history traits: A comparative analysis. Am. Nat. 151, 514-529
Rowley, I., Chapman, G., 1991. The breeding biology, food, social organisation, demography and conservation of the Major Mitchell or Pink Cockatoo, Cacatua leadbeateri, on the margin of the Western Australian Wheatbelt. Aust. J. Zool. 39, 131-142
Sanchez-Mercado, A., Ferrer-Paris, J.R., Rodriguez, J.P., Tella, J.L., 2021. A literature synthesis of actions to tackle illegal parrot trade. Diversity 13, 191
Sanders, M.D., Maloney, R.F., 2002. Causes of mortality at nests of ground-nesting birds in the Upper Waitaki Basin, South Island, New Zealand: a 5-year video study. Biol. Conserv. 106, 225-236
Saunders, D.A., Dawson, R., Mawson, P.R., Cunningham, R.B., 2020. Artificial hollows provide an effective short-term solution to the loss of natural nesting hollows for Carnaby’s Cockatoo Calyptorhynchus latirostris. Biol. Conserv. 245, 108556
Saunders, D.A., Smith, G.T., Rowley, I., 1982. The availability and dimensions of tree hollows that provide nest sites for cockatoos (Psittaciformes) in Western Australia. Wildl. Res. 9, 541-556
Schaaf, A.A., Garcia, C.G., Ruggera, R.A., Tallei, E., Vivanco, C.G., Rivera, L., et al., 2021. Influence of logging on nest density and nesting microsites of cavity-nesting birds in the subtropical forests of the Andes. Forestry 95, 73-82
Schaaf, A.A., Ruggera, R.A., Vivanco, C.G., Tallei, E., Benavidez, A., Albanesi, S., et al., 2020. Tree use, niche breadth and overlap for excavation by woodpeckers in subtropical piedmont forests of northwestern Argentina. Acta Ornithol. 55, 111-119
Shoemaker, K.T., Breisch, A.R., Jaycox, J.W., Gibbs, J.P., 2013. Reexamining the minimum viable population concept for long-lived species. Conserv. Biol. 27, 542-551
Stattersfield, A.J., Crosby, M.J., Long, A.J., Wege, D.C., 1998. Endemic bird areas of the world: priorities for biodiversity conservation. BirdLife Conservation Series No. 7, BirdLife International
Stojanovic, D., Alves, F., Cook, H., Crates, R., Heinsohn, R., Peters, A., et al., 2017. Further knowledge and urgent action required to save Orange-bellied Parrots from extinction. Emu 118, 126-134
Tatayah, R.V.V., Malham, J., Haverson, P., Reuleaux, A., Van de Wetering, J., 2007. Design and provision of nest boxes for echo parakeets Psittacula eques in Black River Gorges National Park, Mauritius. Conserv. Evid. 4, 16-19
Trainor, C.R., Verbelen, P., Johnstone, R.E., 2012. The avifauna of Alor and Pantar, Lesser Sundas, Indonesia. Forktail 28, 77-92
Valle, S., Collar, N.J., Harris, W.E., Marsden, S.J., 2018. Trapping method and quota observance are pivotal to population stability in a harvested parrot. Biol Conserv. 217, 428-436
Vigo-Trauco, G., Garcia-Anleu, R., Brightsmith, D.J., 2021. Increasing survival of wild macaw chicks using foster parents and supplemental feeding. Diversity 13, 121
Walker, J.S., Cahill, A.J., Marsden, S.J., 2005. Factors influencing nest-site occupancy and low reproductive output in the Critically Endangered Yellow-crested Cockatoo Cacatua sulphurea on Sumba, Indonesia. Bird Conserv. Int. 15, 347-359
White, K.L., Eason, D.K., Jamieson, I.G., Robertson, B.C., 2015. Evidence of inbreeding depression in the critically endangered parrot, the kakapo. Anim. Conserv. 18, 341-347
White, T.H.J., Brown, G.G., Collazo, J.A., 2006. Artificial cavities and nest site selection by Puerto Rican Parrots: a multiscale assessment. Avian Conserv. Ecol. 1, 5
Widmann, P., Lacerna-Widmann, I.D., 2008. The cockatoo and the community: ten years of Philippine Cockatoo Conservation Programme. BirdingASIA 10, 23-29
We thank the staff of Matalawa National Park (in particular A.R.M. Sianturi, G. Gabriel) and Burung Indonesia (in particular R.N.D. Limu, C.U. Daula, D.H. Wali, Y. Djawarai, D. Agista, A. Widyanto) for their help; our guides and hosts on Sumba for their support and hospitality; the Indonesian Government for permission to undertake this research (Ristekdikti Research Permit 57/EXT/SIP/FRP/E5/Dit.KI/VII/2017 and KLHK/KNP Simaksi SI.60/SET/HKST/Kumil/10/2017, cooperation agreement with Matalawa National Park PKS.4/T.28/TU/KSA/03/2018); our local counterparts Burung Indonesia, Bogor Agricultural University (IPB University) and Universitas Nusa Cendana Kupang for their support; T. Arndt for initiating this study and J. Malham for sharing the camera trapping method. Our work on Sumba was funded by Zoologische Gesellschaft für Arten- und Populationsschutz (Fond für bedrohte Papageien and Strunden Papageienstiftung). A.R. was supported by a scholarship of the German Academic Exchange Service (DAAD Doktorandenstipendium) and by Loro Parque Fundación. The funders did not have any input into the content of this manuscript, and did not require approval of the manuscript before submission or publication.
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).