|Red List Category & Criteria:
||Butchart, S. & Symes, A.
||Ekstrom, J., Butchart, S., Newton, P., Calvert, R.
This species has an extremely 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). The population trend appears to be stable, and hence the species does not 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.
|Previously published Red List assessments:|
- 2009 – Least Concern (LC)
- 2008 – Least Concern (LC)
- 2004 – Least Concern (LC)
- 2000 – Lower Risk/least concern (LR/lc)
- 1994 – Lower Risk/least concern (LR/lc)
- 1988 – Lower Risk/least concern (LR/lc)
|Range Description:||Bulwer's Petrel is pantropical, being found in all three oceans outside the breeding season. Breeding sites include the eastern Atlantic from the Azores, Portugal to Cape Verde, and the Pacific from eastern China and the Bonin Islands (Japan), east to the Hawaiian Islands (USA), and the Marquesas Islands (French Polynesia) (del Hoyo et al. 1992). |
Cape Verde; China; French Guiana; French Polynesia; Indonesia; Japan; Kiribati; Malaysia; Marshall Islands; Mauritania; Micronesia, Federated States of ; Morocco; Northern Mariana Islands; Palau; Portugal; Saint Helena, Ascension and Tristan da Cunha; Senegal; Spain (Canary Is.); Taiwan, Province of China; Timor-Leste; United States (Hawaiian Is.); United States Minor Outlying Islands
Australia; Barbados; France; India; Ireland; Italy; Maldives; Netherlands; South Africa; Sri Lanka; Trinidad and Tobago
Present - origin uncertain:
American Samoa (American Samoa); Anguilla; Antigua and Barbuda; Brazil; British Indian Ocean Territory; Cambodia; Christmas Island; Cocos (Keeling) Islands; Cook Islands; Côte d'Ivoire; Dominica; Ecuador; Fiji; French Southern Territories; Gambia; Guadeloupe; Guinea; Guinea-Bissau; Guyana; Liberia; Madagascar; Martinique; Mauritius; Mexico; Nauru; Papua New Guinea; Philippines; Pitcairn; Réunion; Saint Lucia; Samoa; Sao Tomé and Principe; Seychelles; Sierra Leone; Singapore; Solomon Islands; Somalia; Suriname; Thailand; Tokelau; Tonga; Tuvalu; Viet Nam; Wallis and Futuna; Western Sahara
|♦ Continuing decline in area of occupancy (AOO):||Unknown|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||108000000|
|♦ Continuing decline in extent of occurrence (EOO):||Unknown||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Continuing decline in number of locations:||Unknown|
|♦ Extreme fluctuations in the number of locations:||No|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Brooke (2004) estimated the global population to number c.500,000-1,000,000 individuals, while national population estimates include: c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in China; < c.100 breeding pairs and c.1,000-10,000 individuals on migration in Taiwan and c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in Japan (Brazil 2009).|
Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
|Current Population Trend:||Stable|
|♦ Continuing decline of mature individuals:||Unknown|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||No|
|♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||No|