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Non-native Monk Parakeets (Myiopsitta monachus) in Rome’s largest urban parks: nest density, host tree characteristics, and management recommendations Cover

Non-native Monk Parakeets (Myiopsitta monachus) in Rome’s largest urban parks: nest density, host tree characteristics, and management recommendations

Open Access
|Jan 2026

References

  1. Avery, M., Shiels, A.B., 2017. Monk and Rose-Ringed Parakeets. In Pitt, W.C., Beasley, J.C., Witmer, G.W. (eds). Ecology and management of terrestrial vertebrate invasive species in the United States. Boca Raton: CRC Press, p 333–357.
  2. Avery, M.L., Tillman, E.A., Keacher, K.L., Arnett, J.E., Lundy, K.J., 2012. Biology of invasive Monk parakeets in South Florida. Wilson Journal of Ornithology, 124: 581–588.
  3. Battisti, C., 2018. Unifying the trans-disciplinary arsenal of project management tools in a single logical framework: further suggestion for IUCN project cycle development. Journal for Nature Conservation, 41: 63–72. https://doi.org/10.1016/j.jnc.2017.11.005
  4. Battisti, C., 2019. Impact of monk parakeet Myiopsitta monachus on commercial orchards: evidence on persimmon Diospyros kaki fruits (Rome, central Italy). Alula, 26: 139–142.
  5. Battisti, C., Cerfolli, F., 2022. Monk parakeets Myiopsitta monachus in a suburban Eucalyptus woodpatch (waste water treatment plants, Ostia, central Italy): A note on nest site selection. Alula, 29 (1-2): 114–117.
  6. Battisti, C., Fanelli, G., 2021. A fine-grained analysis of a Monk parakeet (Myiopsitta monachus) nest suggests a nonhomogeneous internal structure. Zoology and Ecology, 31 (1): 60–63. https://doi.org/10.35513/21658005.2021.1.6
  7. Battisti, C., Fanelli, G., 2022. Foraging diet of the two commonest non-native parakeets (Aves, Psittaciformes) in Italy: assessing their impact on ornamental and commercial plants. Rendiconti Lincei. Scienze Fisiche e Naturali, 33 (2): 431–439. https://doi.org/10.1007/s12210-022-01067-8
  8. Biondi, M., Guerrieri, G., De Vita, S., Pietrelli, L., 2005. Gli uccelli esotici sul litorale romano (1978–2004): status, distribuzione ed annotazioni eco-etologiche [Exotic birds on the Roman coast (1978–2004): status, distribution and eco-ethological observations]. Alula, 12 (1-2): 23–30. (In Italian).
  9. Blanco-González, J., Cayuela, L., Enríquez, F., Aldea, I., Ortiz, J.C., López-Rull, I., 2025. Developing best management practices for the invasive monk parakeet (Myiopsitta monachus) in urban environments. NeoBiota, 98: 163. https://doi.org/10.3897/neobiota.98.132982
  10. Briceño, C., Larraechea, M., Alvarado, S., 2022. Monk Parakeet’s (Myiopsitta monachus) ecological parameters after five decades of invasion in Santiago Metropolis, Chile. Birds, 3: 341–358. https://doi.org/10.3390/birds3040023
  11. Brunelli, M., Sarrocco, S., Corbi, F., Sorace, A., Boano, A., De Felici, S., Guerrieri, G., Meschini, A., Roma, S. (eds), 2011. Nuovo atlante degli uccelli nidificanti nel Lazio [New atlas of birds nesting in Lazio]. Rome: Edizioni ARP (Agenzia Regionale Parchi). 464 p. (In Italian).
  12. Burger, J., Gochfeld, M., 2000. Nest site selection in monk parakeets (Myiopsitta monachus) in Florida. Bird Behavior, 13 (2): 99–105.
  13. Burger, J., Gochfeld, M., 2005. Nesting behavior and nest site selection in monk parakeets (Myiopsitta monachus) in the Pantanal of Brazil. Acta Ethologica, 8: 23–34. https://doi.org/10.1007/s10211-005-0106-8
  14. Burger, J., Gochfeld, M., 2009. Exotic monk parakeets (Myiopsitta monachus) in New Jersey: nest site selection, rebuilding following removal, and their urban wildlife appeal. Urban Ecosystems, 12: 185–196. https://doi.org/10.1007/s11252-009-0094-y
  15. Burgio, K.R., Rubega, M.A., Sustaita, D., 2014. Nest-building behavior of Monk Parakeets and insights into potential mechanisms for reducing damage to utility poles. PeerJ, 2: e601. https://doi.org/10.7717/peerj.601
  16. Calzada Preston, C.E., Pruett-Jones, S., Eberhard, JR., 2021. Monk parakeets as a globally naturalized species. In Pruett-Jones, S. (ed.). Naturalized parrots of the world: distribution, ecology, and impacts of the world’s most colorful colonizers. Princeton, NJ, USA: Princeton University Press, p. 173–192.
  17. Castro, J., Sáez, C., Molina-Morales, M., 2022. The monk parakeet (Myiopsitta monachus) as a potential pest for agriculture in the Mediterranean basin. Biological Invasions, 24 (4): 895–903. https://doi.org/10.1007/s10530-021-02702-5
  18. Catalano, M., 1995. Ville, parchi e verde pubblico. L’Ecosistema Roma: ambiente e territorio, conoscenze attuali e prospettive per il Duemila [Villas, parks and public green spaces. The ecosystem of Rome: environment and territory, current knowledge and prospects for the 21st century]. Rome: Fratelli Palombi editori. 292 p.
  19. Chaney, W.R., 1993. Cedrus libani [Cedar of Lebanon]. Arbor Age, 13 (1): 26–27.
  20. Chao, C.T., Krueger, R.R., 2007. The date palm (Phoenix dactylifera L.): overview of biology, uses, and cultivation. HortScience, 42 (5): 1077–1082. https://doi.org/10.21273/HORTSCI.42.5.1077
  21. Cecili, G., De Fioravante, P., Dichicco, P., Congedo, L., Marchetti, M., Munafò, M., 2023. Land cover mapping with convolutional neural networks using Sentinel-2 images: case study of Rome. Land, 12 (4): 879. https://doi.org/10.3390/land12040879
  22. Cignini, B., 2015. Le Ville e i giardini di Roma [The Rome’s villas and gardens]. Rome: Palombi editori.
  23. Clemente, M., Pignatti, G., Degaetano, M., Corona, P., 2025. A “Street Tree” Master Plan for the Strategic Management of Linear Reforestation and Urban Landscape Enhancement in Rome, Italy. Land, 14 (3): 606. https://doi.org/10.3390/land14030606
  24. Dirr, M.A., Lindstrom, O.M., Lewandowski, R., Vehr, M.J., 1993. Cold hardiness estimates of woody taxa from cultivated and wild collections. Journal of Environmental Horticulture, 11 (4): 200–203.
  25. Di Santo, M., Vignoli, L., Battisti, C., Bologna, M.A., 2013. Feeding activity and space use of a naturalized population of Monk Parakeet, Myiopsitta monachus, in a Mediterranean urban area. Revue d’Ecologie, 68 (3-4): 275–282.
  26. Di Santo, M., Battisti, C., Bologna, M.A., 2017a. Inter-specific interactions in nesting and feeding urban sites among introduced monk parakeet (Myiopsitta monachus) and syntopic bird species. Ethology, Ecology and Evolution, 29: 138–148. https://doi.org/10.1080/03949370.2015.1119761
  27. Di Santo, M., Bologna, M.A., Battisti, C., 2017b. Nest tree selection in a crowded introduced population of Monk Parakeet (Myiopsitta monachus) in Rome (central Italy): evidence for selectivity. Zoology and Ecology, 27 (3-4): 196–201. https://doi.org/10.1080/21658005.2017.1366293
  28. Eberhard, J.R., 1996. Nest adoption by Monk parakeets. Wilson Bulletin, 108: 374–377.
  29. Eberhard, J.R., 1998. Breeding biology of the Monk parakeet. Wilson Bulletin, 110: 463–473.
  30. Farjon, A., 1990. Pinaceae: drawings and descriptions of the genera Abies, Cedrus, Pseudolarix, Keteleeria, Nothotsuga, Tsuga, Cathaya, Pseudotsuga, Larix, and tissue cultures of Cedrus deodara and Pinus roxburghii. Königstein: Koeltz Scientific Books. 330 p.
  31. González-Pérez, M.A., Caujapé-Castells, J., Sosa, P.A., 2004. Molecular evidence of hybridisation between the endemic Phoenix canariensis and the widespread P. dactylifera with Random Amplified Polymorphic DNA (RAPD) markers. Plant Systematics and Evolution, 247: 165–175. https://doi.org/10.1007/s00606-004-0166-7
  32. Granatosky, M.C., Young, M.W., Herr, V., Chai, C., Raidah, A., Kairo, J.N., Anaekwe, A., Havens, A., Zou, B., Ding, B., Chen, C., Leon, D.D., Shah, H., Valentin, J., Hildreth, L., Castro, T., Li, T., Yeung, A., Dickinson, E., Youlatos, D., 2022. Positional behavior of introduced Monk Parakeets (Myiopsitta monachus) in an urban landscape. Animals, 12: 2372. https://doi.org/10.3390/ani12182372
  33. Grandi, G., Menchetti, M., Mori, E., 2018. Vertical segregation by breeding ring-necked parakeets Psittacula krameri in northern Italy. Urban Ecosystems, 21 (5): 1011–1017. https://doi.org/10.1007/s11252-018-0779-1
  34. Hammer, Ø., Harper, D.A., Ryan, P.D., 2001. Past: paleontological statistics software package for education and data analysis. Palaeontologia Electronica, 4 (1). [cit. 2025-05-28]. http://palaeo-electronica.org/2001_1/past/issue1_01.htm
  35. Harrison, C.J.O., 1973. Nest-building behaviour of quaker parrots Myiopsitta monachus. Ibis, 115: 124–128.
  36. Hernández-Brito, D., Blanco, G., Tella, J.L., Carrete, M., 2020. A protective nesting association with native species counteracts biotic resistance for the spread of an invasive parakeet from urban into rural habitats. Frontiers in Zoology, 17: 1–13. https://doi.org/10.1186/s12983-020-00360-2
  37. Hernández-Brito, D., Carrete, M., Tella, J.L., 2022. Annual censuses and citizen science data show rapid population increases and range expansion of invasive rose-ringed and monk parakeets in Seville, Spain. Animals, 12 (6): 677. https://doi.org/10.3390/ani12060677
  38. Hyman, J., Pruett-Jones, S., 1995. Natural history of the Monk parakeet in Hide Park, Chicago. Wilson Bulletin, 107: 510–517.
  39. Isaac, B., Cooke, R., Simmons, D., Hogan, F., 2008. Predictive mapping of powerful owl (Ninox strenua) breeding sites using Geographical Information Systems (GIS) in urban Melbourne, Australia. Landscape and Urban Planning, 84 (3-4): 212–218. https://doi.org/10.1016/j.landurbplan.2007.08.002
  40. Keller, R.P., Geist, J., Jeschke, J.M., Kühn, I., 2011. Invasive species in Europe: ecology, status, and policy. Environmental Sciences Europe, 23: 23. https://doi.org/10.1186/2190-4715-23-23
  41. Lucchese, F., 2017. Atlante della Flora alloctona del Lazio: cartografia, ecologia e biogeografia. Vol. 1: Parte generale e flora alloctona [Atlas of the non-native flora of Lazio: cartography, ecology, and biogeography. Vol. 1: General overview and non-native species]. Roma: Regione Lazio, Direzione Ambiente e Sistemi Naturali. 352 p. (In Italian).
  42. MacGregor-Fors, I., Calderón-Parra, R., Meléndez-Herrada, A., López López, S., Schondube, J.E., 2011. Pretty, but dangerous! records of non-native monk parakeets (Myiopsitta monachus) in Mexico. Revista Mexicana de Biodiversidad, 82: 1053–1056.
  43. Martella, M.B., Bucher, E.H., 1990. Vocalizations of the monk parakeet. Bird Behavior, 8 (2): 101–110.
  44. Menchetti, M., Mori, E., 2014. Worldwide impact of alien parrots (Aves Psittaciformes) on native biodiversity and environment: a review. Ethology, Ecology and Evolution, 26: 172–194. https://doi.org/10.1080/03949370.2014.905981
  45. Mentil, L., Battisti, C., Carpaneto, G.M., 2018. The impact of Psittacula krameri (Scopoli, 1769) on orchards: first quantitative evidence for Southern Europe. Belgian Journal of Zoology, 148 (2): 129–134. https://doi.org/10.26496/bjz.2018.22
  46. Moran, S., Keidar, H., 1993. Checklist of vertebrate damage to agriculture in Israel. Crop Protection, 12: 173–182. https://doi.org/10.1016/0261-2194(93)90105-R
  47. Mori, E., Di Febbraro, M., Foresta, M., Melis, P., Romanazzi, E., Notari, A., Boggiano, F., 2013. Assessment of the current distribution of free-living parrots and parakeets (Aves: Psittaciformes) in Italy: a synthesis of published data and new records. Italian Journal of Zoology, 80 (2): 158–167. https://doi.org/10.1080/11250003.2012.738713
  48. Pijut, P.M., 2000. Cedrus - the true cedars. Journal of Arboriculture, 26 (4): 218–224.
  49. Postigo, J.L., Carrillo-Ortiz, J.J., Domènech, J., Tomàs, X., Arroyo, L., Senar, J.C., 2021. Dietary plasticity in an invasive species and implications for management: the case of the monk parakeet in a Mediterranean city. Animal Biodiversity and Conservation, 44: 185–194. https://doi.org/10.32800/abc.2021.44.0185
  50. Postigo, J.L., Shwartz, A., Strubbe, D., Muñoz, A.R., 2017. Unrelenting spread of the alien monk parakeet Myiopsitta monachus in Israel. Is it time to sound the alarm? Pest Management Science, 73 (2): 349–353. https://doi.org/10.1002/ps.4349
  51. Pranty, B., 2009. Nesting substrates of Monk parakeets (Myiopsitta monachus) in Florida. Florida Field Naturalist, 37: 51–57.
  52. Reed, J.E., McCleery, R.A., Silvy, N.J., Smeins, F.E., Brightsmith, D.J., 2014. Monk parakeet nest-site selection of electric utility structures in Texas. Landscape and Urban Planning, 129: 65–72. https://doi.org/10.1016/j.landurbplan.2014.04.016
  53. Romero, I.P., Codesido, M., Bilenca, D.N., 2015. Nest building by Monk Parakeets Myiopsitta monachus in urban parks in Buenos Aires, Argentina: are tree species used randomly? Ardeola, 62 (2): 323–333. https://doi.org/10.13157/arla.62.2.2015.323
  54. Senar, J.C., Carrillo-Ortiz, J.G., Ortega-Segalerva, A., Dawson Pell, F.S.E., Pascual, J., Arroyo, L., Mazzoni, D., Montalvo, T., Hatchwell, B.J., 2019. The reproductive capacity of Monk Parakeets Myiopsitta monachus is higher in their invasive range. Bird Study, 66: 136–140. https://doi.org/10.1080/00063657.2019.1585749
  55. Senar, J.C., Conroy, M.J., Montalvo, T., 2021. Decision making models and management of the Monk Parakeet. In Pruett-Jones, S. (ed.). Naturalized parrots of the world. Princeton, NJ, USA: Princeton University Press, p. 102–122.
  56. Senar, J.C., Domènech, J., Arroyo, L., Torre, I., Gordo, O., 2016. An evaluation of monk parakeet damage to crops in the metropolitan area of Barcelona. Animal Biodiversity and Conservation, 39: 141–145. https://orcid.org/0000-0003-3766-0566
  57. Sol, D., Santos, D.M., Feria, E., Clavell, J., 1997. Habitat selection by the Monk Parakeet during colonization of a new area in Spain. Condor, 99 (1): 39–46.
  58. Sosa, P.A., Saro, I., Johnson, D., Obón, C., Alcaraz, F., Rivera, D., 2021. Biodiversity and conservation of Phoenix canariensis: a review. Biodiversity and Conservation, 30 (2): 275–293. https://doi.org/10.1007/s10531-020-02096-1
  59. Strubbe, D., Matthysen, E., 2009a. Establishment success of invasive ring necked and monk parakeets in Europe. Journal of Biogeography, 36: 2264–2278. https://doi.org/10.1111/j.1365-2699.2009.02177.x
  60. Strubbe, D., Matthysen, E., 2009b. Experimental evidence for nest-site competition between invasive ring-necked parakeets (Psittacula krameri) and native nuthatches (Sitta europaea). Biological Conservation, 142 (8): 1588–1594. https://doi.org/10.1016/j.biocon.2009.02.026
  61. Taffon, D., Giucca, F., Battisti, C., 2008. Atlante degli uccelli nidificanti nel Parco Regionale dell’Appia Antica [Atlas of nesting birds in the Appia Antica Regional Park]. Roma: Ente Parco Regionale dell’Appia Antica – Provincia di Roma, Gangemi edizioni. 191 p. (In Italian).
  62. Vignoli, L., Mocaer, I., Luiselli, L., Bologna, M.A., 2009. Can a large metropolis sustain complex herpetofauna communities? An analysis of the suitability of green space fragments in Rome. Animal Conservation, 12 (5): 456–466. https://doi.org/10.1111/j.1469-1795.2009.00273.x
  63. Zocchi, A., Lacroix, L., Bianchi, M., Battisti, C., 2004. Characteristics of black kite Milvus migrans nest-trees in two Italian colonies. Avocetta, 28 (1): 9–14.
  64. Zocchi, A., Battisti, C., Santoro, R., 2009. Note sul pappagallo monaco, Myiopsitta monachus, a Roma (Villa Pamphili) [Notes on the Monk Parakeet, Myiopsitta mona-chus in Rome (Villa Pamphili)]. Rivista Italiana di Ornitologia, 78: 135–137. (In Italian).
DOI: https://doi.org/10.2478/foecol-2026-0003 | Journal eISSN: 1338-7014 | Journal ISSN: 1336-5266
Language: English
Page range: 24 - 33
Submitted on: Jun 19, 2025
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Accepted on: Nov 21, 2025
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Published on: Jan 26, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year

© 2026 Corrado Battisti, Federico Lupo, Massimiliano Scalici, published by Slovak Academy of Sciences, Institute of Forest Ecology
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