African Penguin vs Humboldt Penguin

African Penguin

Spheniscus demersus

Huge3.1 kgMarine

African penguins grow to 60–70 cm (24–28 in) tall and weigh between 2.2–3.5 kg (4.9–7.7 lb). The beak length of the African penguin varies, usually growing between 4.8–6.5 cm (1.9–2.6 in). They have a black stripe and black spots on the chest, the pattern of which is unique to each penguin, like human fingerprints. The sweat glands above the eyes cool the birds' blood and as the temperature rises, increased blood flow causes the glands to get pinker. This species exhibits slight sexual dimorphism; the males are slightly larger than the females and have longer beaks.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Sander Spek · Public domain

Humboldt Penguin

Spheniscus humboldti

Huge4.4 kgMarine

Humboldt penguins are medium-sized penguins, growing to 56–70 cm (22–28 in) long and a weight of 2.9 to 6 kg (6.4 to 13.2 lb). The sex of the Humboldt penguin cannot be recognised via differences in plumage, as they are monomorphic. The male is heavier and larger than the females. Their sex can be determined via head width and bill length; the male has a longer bill than the female. While all the Spheniscus penguins are close to each other in size, the Humboldt penguin is the heaviest species in the genus, with 123 females weighing 4.05 kg (8.9 lb) on average and 165 males averaging 4. Voice: The Humboldt penguin has different calls that it uses to communicate in different ways. The function of its calls are consistent among Spheniscus species. If an individual comes too close to an adult Humboldt penguin, the Yell is a warning call which is followed by pecking or chasing if ignored.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Dimitri “Diti” Torterat · CC BY 2.0 fr

Photos and recordings are credited to their authors under the licence shown. Full profiles: African Penguin and Humboldt Penguin.