The 'Galápagos Penguin' (''Spheniscus mendiculus'') is a
penguin endemic to the
Galápagos Islands. It is the only penguin to live on the
equator and can survive due to the cool temperatures resulting from the
Humboldt Current and cool waters from great depths brought up by the
Cromwell Current. Its nearest relatives are the
African Penguin, the
Magellanic Penguin and the
Humboldt Penguin. The Galápagos Penguin occurs primarily on
Fernandina Island and the west coast of
Isabela Island, but small populations are scattered on other islands in the
Galápagos archipelago.
Galápagos Penguins grow to between 48-53 cm tall. They have a black head with a white border running from behind the eye, around the black ear-coverts and chin, to join on the throat. They have blackish-grey upperparts and whitish underparts, with two black bands across the breast, the lower band extending down the flanks to the thigh. Juveniles differ in having a wholly dark head, greyer on side and chin, and no breast-band.
The Galápagos Penguin mates for life. It lays one or two eggs in places such as caves and crevices, protected from direct sunlight, which can lead to the eggs overheating. One parent will always stay with the eggs or chicks while the other is absent for several days to feed. If there is not enough food available, the nest may be abandoned.
The species is
endangered, with an estimated population size of around 1,500 individuals in 2004, according to a survey by the
Charles Darwin Research Station. The population underwent an alarming decline of 65% in the 1980s, but is slowly recovering. It is therefore the rarest penguin species (a status which is often falsely attributed to the
Yellow-eyed penguin). Population levels are influenced by the effects of the
El Niño Southern Oscillation, which reduces the availability of shoaling fish, leading to low reproduction or starvation. However, anthropogenic factors (e.g. oil pollution, fishing
by-catch and competition) may be adding to the ongoing demise of this species. On Isabela Island, the introduced
cats,
dogs and
rats may attack penguins and destroy their nests.

Galapagos Penguin juveniles.
References
★ Database entry includes justification for why this species is endangered
External links
★
Galápagos penguins from the International Penguin Conservation Web Site
★
Galápagos penguins pictures
★
BirdLife Species Factsheet
★
Penguin World: Galápagos penguin
★
www.pinguins.info : information about all species of penguins