Back in 2011, 71-year-old Brazilian widower João Pereira de Souza found a beached Magellanic penguin, soaked in oil and struggling to survive. The kindly old man cleaned it off and fed it a few sardines before bringing it back to the water, where he expected the bird would return happily to the wild. Amazingly, it refused to leave his side and ever since then, de Souza and Jingjing (the name he gave to the penguin) have been best friends.
The most incredible thing about this duo is that Jingjing is not exactly domesticated - he still swims away in February to go join his brethren in cooler climates 2,000 miles away. But come June, he always shows up back at de Souza's seaside shanty. This has gone on for the past four years and at this point Jingjing is somewhat of a local celebrity in the area.