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Sula variegata

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA AVES SULIFORMES SULIDAE

Scientific Name: Sula variegata
Species Authority: (Tschudi, 1843)
Common Name(s):
English Peruvian Booby

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.
Justification:
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). The population trend appears to be fluctuating, 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 extremely 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: The Peruvian Booby is found in the area of the Humboldt Current, breeding from northern Peru to central Chile, with non-breeders being found as far as south-west Ecuador1.
Countries:
Native:
Chile; Colombia; Ecuador; Peru
Vagrant:
Panama
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: This strictly marine species feeds close to the coast in cool, rich waters of upwellings where food is abundant. It feeds almost exclusively on abundant supplies of anchovetta, but will switch to other fish species when stocks collapse. Feeding mostly occurs by plunge-diving from moderate height, usually in groups of more than 30-40 individuals. Breeding is only loosely seasonal on bare, arid islets along rocky coasts, mostly on cliff ledges in Chile, but preferring open, flat ground in Peru. It is largely sedentary, but will disperse widely during El Nino years (del Hoyo et al. 1992).
Systems: Terrestrial; Marine

Citation: BirdLife International 2012. Sula variegata. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 25 October 2014.
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