Sea Birds

Peruvian Boobies

Peruvian Boobies (Sula variegata)

The Peruvian Boobies, Sula variegata, is an endemic bird of the Peruvian current whose distribution is restricted to the west coast of South America from Punta Pariñas (4.6°S) in Peru to Concepción in Chile (Harrison 1988).

A Colony Of Peruvian Boobies
A Colony Of Peruvian Boobies

It is the second most abundant seabird species that inhabits the Peruvian Coast and the second most important guano-producing seabird. During the mid-twentieth century, the Peruvian Booby population reached 3 million birds (Tovar et al. 1987).

Status

After ENSO 1982-83, less than 0.2 million birds were left. The Peruvian Booby population was recovering since 1984 and reached in 1996 more than 2.6 million birds.

ENSO 1997-98 started after most boobies finished the breeding season and caused a southward migration of birds. The number of Peruvian Boobies in Peru decreased through 1997 by about 87.1% due to this reason, few birds were found dead along the coast.

A Female Peruvian Boobies Guards Their Hatchlings
A Female Peruvian Boobies Guards Their Hatchlings

Breeding / Nesting

Peruvian Boobies breed throughout the year. The main breeding season occurs during the austral spring-summer period (September to March) and most pairs may attempt to breed for a second time during the year depending on food availability.

Peruvian Boobies clutch size varies from one to four eggs, but clutches of two or three eggs, pale blue, are usually found. Eggs are incubated for approximately 4 to 5 weeks, both adults share the nest attendance.

The rearing period lasts about 3 months. Breeding success depends on food availability and is related to colony location, colony size, and timing of breeding.

 

Copyright: Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.org.

 


 

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Gordon Ramel

Gordon is an ecologist with two degrees from Exeter University. He's also a teacher, a poet and the owner of 1,152 books. Oh - and he wrote this website.

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