What are the most endangered penguins?

"The African Penguins have been decreasing, by 60 percent now, since 2004, so that's why we are all very worried," said Lorien Pichegru of the Percy FitzPatrick Institute of African Ornithology.

"There's 26,000 pairs left and that's the lowest number ever recorded. At the beginning of the 20th century we had more than 2 million birds."