Egretta rufescens

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA AVES PELECANIFORMES ARDEIDAE

Scientific Name: Egretta rufescens
Species Authority: (Gmelin, 1789)
Common Name(s):
English Reddish Egret
Synonym(s):
Hydranassa rufescens rufescens Stotz et al. (1996)

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Bruzual, L., Green, C., Kasner, A., Kushlan, J., MacKinnon, B., Melville, S., Mitchell, A., Palacios, E., Rodriguez, R. & Valdez, E.
Facilitator/Compiler(s): Bird, J., Butchart, S., Ekstrom, J., Sharpe, C J
Justification:
This species is classified as Near Threatened because despite its large range it occupies a restricted habitat and is patchily distributed. For this reason it is assumed to have a moderately small and declining global population.

Geographic Range [top]

Range Description:Egretta rufescens occurs in Baja California and disperses south along the Pacific coast of Mexico, but the majority are found in the Caribbean along the southern coast of the USA, through the Caribbean islands and down the Central American coast to northern Colombia and Venezuela. Surveys in western Mexico identified 39 breeding sites including eighteen nesting sites in Baja California Sur, eight in Sinaloa, six in Baja California, five in Sonora, and only two in Chiapas. The largest Mexican colony supports 258 breeding pairs while the average colony size was 35 pairs. The population estimate for the west coast of Mexico was between 954 and 1,260 breeding pairs (Palacios and Amador-Silva 2008). Numbers have not been collated for the entire Caribbean, but the following figures have been compiled: 1,000 pairs at Green Island, Texas, 200 - 300 pairs elsewhere in Texas, <200 pairs at Tamaulipas, Mexico (Laguna Madre), 50 pairs at Inagua, Bahamas and 50 pairs elsewhere in the Bahamas, and up to 200 pairs in Florida (Palacios and Amador-Silva 2008, S. Melville in litt. 2008). Accurate data are not available for other sites in the Caribbean, but latest information suggests it is a common resident (and migrant) throughout coastal Cuba and on many cays - 23 are listed with one, Cayo Fragoso noted as a breeding colony (A. Mitchell in litt. 2008); in the Dominican Republic it is considered a locally common breeding resident, and appears to be more common today than in the 1930's (R. Rodríguez-Mojica in litt. 2008); in Puerto Rico it is reportedly very rare (R. Rodríguez-Mojica in litt. 2008); 180 individuals were recorded at one site on the Yucatan in March 2006 demonstrating either that there are a lot more birds than previously thought to occur in the region or that it was a previously poorly recorded migrant (B. MacKinnon in litt. 2009); and finally data from BirdLife International's World Biodiversity Database of Important Bird Areas (IBAs) suggests that there may also be important numbers in Belize with up to c.5,000 resident individuals estimated from three IBAs in the country. This suggests a total of c.10,500-11,300 mature individuals with an unknown additional number in Cuba and the Dominican Republic. Population trends are not well understood; certainly the species seems to be increasing in parts of its range where it is well protected and has safe nesting sites, but declines are reported at the majority of sites.

Countries:
Native:
Antigua and Barbuda; Aruba; Bahamas; Barbados; Belize; Cayman Islands; Colombia; Costa Rica; Cuba; Dominica; Dominican Republic; El Salvador; Guatemala; Haiti; Honduras; Jamaica; Martinique; Mexico; Montserrat; Nicaragua; Puerto Rico; Saint Kitts and Nevis; Saint Lucia; Saint Vincent and the Grenadines; Trinidad and Tobago; Turks and Caicos Islands; United States; Venezuela, Bolivarian Republic of
Vagrant:
Panama; Saint Martin (French part); Virgin Islands, British; Virgin Islands, U.S.
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population: Population estimates throughout its range are: 954-1,260 breeding pairs on the Pacific coast; 1,000 pairs at Green Island, Texas; 200-300 pairs elsewhere in Texas; fewer than 200 pairs at Tamaulipas, Mexico; 50 pairs at Inagua, Bahamas; 50 pairs elsewhere in the Bahamas; up to 200 pairs in Florida, and up to c.5,000 resident individuals in Belize. This suggests a total of c.10,500-11,300 mature individuals with an unknown additional number in Cuba and the Dominican Republic. Therefore it is best placed in the band 10,000-19,999 mature individuals, equivalent to 15,000-29,999 individuals in total, rounded here to 15,000-30,000 individuals.
Population Trend: Increasing

Habitat and Ecology [top]

Habitat and Ecology: The species frequents shallow coastal waters, salt-pans, open marine flats and shorelines; it is rarely recorded away from the coast. It breeds on islands and in mangroves. It feeds mainly on small fish, frogs, tadpoles and crustaceans, using a variety of feeding techniques. It will breed in almost all months of the year, with seasonal peaks that vary in timings across the range. Most breeding takes place along northern coastlines within its range, with non-breeding birds dispersing to the south in the Caribbean and along the Pacific coast.

Systems: Terrestrial; Marine

Threats [top]

Major Threat(s): Populations were heavily exploited for food in the late 19th and early 20th centuries. Today, fluctuations occur at some colonies, apparently relating to predators which can cause rapid declines; recoveries have been observed following predator control. Threats to the species are not well understood, but it is likely to have declined in parts of its range owing to commercial development of the coastline.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
Nineteen of the 39 breeding sites identified on the Pacific coast of Mexico occur in protected areas (Palacios and Amador-Silva 2008). Ongoing studies are underway on the Caribbean coast of Mexico and the southern USA.

Conservation Actions Proposed
Clarify its population status in Cuba, Belize and other parts of the Caribbean. Monitor populations to determine trends. Identify threats to the species. Implement predator control at key colonies.

Bibliography [top]

del Hoyo, J.; Elliot, A.; Sargatal, J. 1992. Handbook of the Birds of the World, vol. 1: Ostrich to Ducks. Lynx Edicions, Barcelona, Spain.

Green, R.F. 2006. A simpler, more general method of finding the optimal foraging strategy for Bayesian birds. Oikos 112(2): 274-284.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: http://www.iucnredlist.org. (Accessed: 19 June 2012).

Palacios, E. Amador-Silva, E. S. 2008. Status and breeding distribution of the Reddish Egret in Western Mexico.


Citation: BirdLife International 2012. Egretta rufescens. In: The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 23 August 2014.
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