This species has (at least temporarily) been saved from extinction. Conservation action has increased the population since 1975, but it is still Critically Endangered because numbers remain tiny and fluctuating.
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.
Distribution and populationAmazona vittata
30 cm. Green parrot with red forecrown, white eye-ring and blue two-toned primaries. Similar spp. Introduced Hispaniolan Parrot A. ventralis has white forehead, maroon belly and blue in wing extends on to secondaries. Red-crowned Parrot A. viridigenalis has more extensive red on crown and red-orange wing-patch, but is very local around the coast and unlikely to occur sympatrically. Voice Noisy. Wide variety of squawks and screeches. Bugling flight call.
is endemic to Puerto Rico (to U.S.A.)
, and once occurred throughout the forested parts of the island. An endemic subspecies gracilipes
occurred on Culebra, but became extinct in 1912. There has been a drastic decline, which reduced the population to c.2,000 by the 1930s and an all-time low of 13 birds in 1975. It has been confined to the Luquillo Mts since the 1960s, and the present occupied range of 16 km2
represents only 0.2% of its former distribution (Snyder et al.
. Conservation action has prevented the species's extinction, although recovery has been slow and the population remains tiny. In 1989, Hurricane Hugo cut the wild population from 47 to about 23. By the beginning of 1992, there were a minimum of 22-23 parrots in the wild and 58 in captivity, with a record fledging success in July 1992 taking the wild total to 39 or 40. In 2000, the parrot numbered 40 wild birds, plus 10 recently re-introduced birds and 100 in captivity, held in two aviaries (Davis 2000, T. White in litt.
. In 2001, thieves broke into an aviary and stole a number of captive adults. In 2004, the wild population was 30-35 individuals (Arendt 2000)
, and the long-term trend appears to be stable albeit with some fluctuations. In 2006, 20 birds were released in the Rio Abajo State Forest marking the beginning of a second population in the wild (Velez-Valentin and Boyd 2006)
: a further 26 birds were released here in December 2007 and 19 more were released in December 2008, with the first two successful nests recorded in the wild at Rio Abajo in 2008 (T. White in litt.
2005, 2008, 2012)
. As of 2011, the population numbered c.50-70 wild individuals spread over two areas, and about 280 captive individuals (Breining 2009, T. White in litt.
. Population justification
As of 2011, the population numbered c.50-70 individuals spread over two areas, roughly equivalent to 33-47 mature individuals. There is an additional captive population numbering c.280 individuals (T. White in litt.
An increase of 1-19% is estimated to have occurred over the last ten years, based on regular counts of the total wild population, and it is now thought to be stable. Should the second population at Rio Abajo prove to be viable the population may once again increase. Ecology
Historically, it occurred in montane and lowland forest, and mangroves. It is now restricted to forest at elevations of 200-600 m. It breeds between late February and July, when it nests in large, deep tree-cavities and lays 3-4 eggs (Raffaele et al.
1998, Arendt 2000)
. Since 2001, all known nesting in the wild has occurred in artificial cavities (White et al.
There has been an almost total loss of suitable forest habitat. Hunting for food and pest control, and the cage-bird trade have had crippling effects in the past (T. White in litt.
2012). The principal threats are now competition for nest-sites, loss of young to parasitic botflies, predation and natural disasters such as hurricanes (Raffaele et al.
1998, Arendt 2000)
. Red-tailed Hawks Buteo jamaicensis
predate parrots and hamper releases of captive-bred individuals. Predator-aversion training pre-release has improved the survival of captive-reared birds after release into the wild (White et al.
; nevertheless raptor predation claimed 21% of all released individuals between 2000 and 2002. It formerly suffered from competition for nesting cavities with Pearly-eyed Thrasher Margarops fuscatus
but this has been significantly reduced by specially designed artificial nesting cavities (T. White in litt.
2012). Predation by alien invasive mammals is also having a serious impact upon productivity, with six fledglings taken by small Indian mongooses Herpestes javanicus
and one nest-failure from black rats Rattus rattus
during 2000-2003 (Engeman et al.
. Although predation events have not been documented, feral cats (Felis catus
) are also common in parrot habitat in the Caribbean National Forest, are well-documented around the world as devastating bird predators, and represent another invasive mammal threat. Parrots regularly disappear without identification of a cause and cats and mongooses are capable of inflicting unidentifiable losses (R. M. Engeman in litt.
2012). It has been suggested that hurricanes are the most serious limiting factor preventing population recovery, and climate change may cause the frequency of hurricane events to increase
. Furthermore, rainfall hampers the recovery programme, as chicks that fledge either during or before a major rainfall event have a much higher mortality rate than chicks that fledge during drier periods (Breining 2009)
. Conservation actions underway
CITES Appendix I and II. Major intervention to preserve this species began in 1968, involving provision of highly successful artificial nest-sites, control of nest predators and competitors, and captive breeding and reintroduction. The success of newly fledged parrots is monitored using radio-telemetry (Meyers 1996). All remaining habitat is protected in the Caribbean National Forest (Snyder et al.
2000) and the Rio Abajo Commonwealth Forest (T. White in litt.
2012). The population is monitored to help inform management decisions. Controlling exotic mammalian predators (trapping and toxic baiting) has been shown to be a highly cost-effective way of conserving Puerto Rican Amazon (Engeman et al.
2006, R. M. Engeman in litt.
2012). Trapping data has shown the Luquillo Forest to have among the highest black rat densities studied in the world, and optimal rat baiting strategies have been devised for application during nesting. Economic analyses based on empirical production costs for captive-bred parrots showed very high benefit-cost ratios for predator management, estimating that the prevention of one parrot loss every 4–12 years more than offsets all forms of predator management (for all species) in the intervening time (R. M. Engeman in litt.
2012). Around 280 birds are currently held in captivity at Rio Abajo and Luquillo (T. White in litt.
2012) and these are being managed to preserve as much genetic diversity as possible. A release technique known as "precision release" was trialled with six birds in 2008. This involves releasing a small number of captive-reared subadult parrots at each active nest site immediately following the fledging of the chicks, and aims to promote immediate and close interaction between the wild parrots and released birds (T. White in litt.
2005, 2008). Nearly 100 birds have been released from the Rio Abajo aviary in an attempt to establish a second population, which may be aided by lower annual rainfall at the site, lower levels of predation and a change in management techniques (T. White in litt.
2012). Although post-release mortality remains high, successful breeding has been recorded and the size and range of the flock is increasing (Breining 2009, Valentin 2009, T. White in litt.
2012). Conservation actions proposed
Continue to monitor population trends. Track the fate of released birds. Maintain the integrated conservation management programme. Improve synchronisation of breeding of wild and captive birds to increase the number of captive-bred chicks that can be fostered by wild parents (Thompson 2004). Integrate exotic mammalian predator trapping (black rats, small Indian mongooses, feral cats) into the existing conservation management programme, and monitor predator populations to study the efficacy of these measures (R. M. Engeman in litt.
Related state of the world's birds case studies
Snyder, N. F. R.; Wiley, J. W.; Kepler, C. B. 1987. The parrots of Luquillo: natural history and conservation of the Puerto Rican parrot. Western Foundation of Vertebrate Zoology, Los Angeles.
Collar, N. J.; Gonzaga, L. P.; Krabbe, N.; Madroño Nieto, A.; Naranjo, L. G.; Parker, T. A.; Wege, D. C. 1992. Threatened birds of the Americas: the ICBP/IUCN Red Data Book. International Council for Bird Preservation, Cambridge, U.K.
Meyers, J. M.; Vilella, F. J.; Barrow, W. C. 1993. Positive effects of Hurricane Hugo: record years for Puerto Rican Parrots nesting in the wild. Endangered Species Technical Bulletin 18: 1 and 10.
Meyers, J. M. 1996. Survival of radio-collared nestling Puerto Rican Parrots. Wilson Bulletin 108: 159-163.
Raffaele, H.; Wiley, J.; Garrido, O.; Keith, A.; Raffaele, J. 1998. Birds of the West Indies. Christopher Helm, London.
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. Ornitologia Neotropical 11: 13-63.
Snyder, N.; McGowan, P.; Gilardi, J.; Grajal, A. 2000. Parrots: status survey and conservation action plan 2000-2004. International Union for Conservation of Nature and Natural Resources, Gland, Switzerland and Cambridge, UK.
Davis, E. 2000. Regional reports and recovery updates: Puerto Rican Parrot (Amazona vittata). Endangered Species Bulletin 25: 27.
Thompson, J.J. 2004. An age-structured population model of the Puerto Rican parrot (Amazona vittata). Ornitologia Neotropical 15: 289-297.
White, T.H.; Collazo, J. A.; Vilella, F.J. 2005. Survival of captive-reared Puerto Rican Parrots released in the Caribbean National Forest. Condor 107: 424-432.
Engeman, R.; Whisson, D.; Quinn, J.; Cano, F.; Quiñones, P.; White, T.H. 2006. Monitoring invasive mammalian predator populations sharing habitat with the critically endangered Puerto Rican Parrot Amazona vittata. Oryx 40(1): 95-102.
Velez-Valentin, J.; Boyd, J. D. 2006. The Puerto Rican Parrot recovery project. AFA Watchbird 33(2): 59-62.
White, T. H.; Brown, G. G.; Collazo, J. A. 2006. Artificial cavities and nest site selection by Puerto Rican Parrots: a multiscale assessment. Avian Diseases 1(3): art5.
Beissinger, S. R.; Wunderle, J. M.; Meyers, J. M.; Sæther, B.-E.; Engen, S. 2008. Anatomy of a bottleneck: diagnosing factors limiting population growth in the Puerto Rican Parrot. Ecological Monographs 78(2): 185-203.
Valentin, R. 2009. Ups and downs breeding Puerto Rican Parrots. PsittaScene 21(2): 16-18.
Breining, G. 2009. A fighting chance. Audubon: 91-95.
Further web sources of information
Alliance for Zero Extinction (AZE) species/site profile. This species has been identified as an AZE trigger due to its IUCN Red List status and limited range.
Click here for more information about the Alliance for Zero Extinction (AZE)
Detailed species account from the Threatened birds of the Americas: the BirdLife International Red Data Book (BirdLife International 1992). Please note, taxonomic treatment and IUCN Red List category may have changed since publication.
Recuento detallado de la especie tomado del libro Aves Amenazadas de las Americas, Libro Rojo de BirdLife International (BirdLife International 1992). Nota: la taxonomoa y la categora de la Lista Roja de la UICN pudo haber cambiado desde esta publicacin.
View photos and videos, and hear sounds of this species from the Internet Bird Collection
Text account compilers
Benstead, P., Bird, J., Butchart, S., Calvert, R., Isherwood, I., Khwaja, N., Sharpe, C J, Symes, A., Temple, H., Wege, D.
Engeman, R., White, T.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2013) Species factsheet: Amazona vittata. Downloaded from
http://www.birdlife.org on 23/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 23/05/2013.
This information is based upon, and updates, the information published in BirdLife International (2000)
Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004)
Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
Additional resources for this species