Fregata ariel


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Fregata ariel
Species Authority: (Gray, 1845)
Common Name(s):
English Lesser Frigatebird
French Frégate ariel

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ekstrom, J., Butchart, S., Calvert, R.
This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Geographic Range [top]

Range Description: Major breeding populations of the Lesser Frigatebird are found in tropical waters of the Indian and Pacific Ocean (excluding the east Pacific), as well as one population in the South Atlantic (Trinidade and Martim Vaz, Brazil). Outside the breeding season it is sedentary, with immature and non-breeding individuals dispering throughout tropical seas, especially of the Indian and Pacific Oceans (del Hoyo et al. 1992).

Australia; Brazil; British Indian Ocean Territory; Brunei Darussalam; China; Christmas Island; Cocos (Keeling) Islands; Comoros; Fiji; French Polynesia; India; Indonesia; Japan; Kiribati; Korea, Republic of; Madagascar; Malaysia; Maldives; Marshall Islands; Mauritius; Mayotte; Micronesia, Federated States of ; Nauru; New Caledonia; Northern Mariana Islands; Palau; Philippines; Réunion; Seychelles; Singapore; Solomon Islands; Sri Lanka; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Timor-Leste; Tonga; United States; United States Minor Outlying Islands; Vanuatu; Viet Nam; Wallis and Futuna
Djibouti; Eritrea; Israel; Jordan; Kenya; Mozambique; New Zealand; Oman; Somalia
Present - origin uncertain:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: The Lesser Frigatebird breeds on small, remote tropical and sub-tropical islands, in mangroves or bushes, and even on bare ground. It feeds mainly on fish (especially flying-fish) and squid, but also on seabird eggs and chicks, carrion and fish scraps (del Hoyo et al. 1992). Kleptoparasitic behaviour is observed in this species; however it is unlikely to be a major chick-provisioning resource (Congdon and Preker 2004).

Systems: Terrestrial; Marine

Citation: BirdLife International 2012. Fregata ariel. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 30 August 2015.
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