Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating.
Emperor penguin - Aptenodytes forsteri. This is the largest species of penguins. Emperor penguins are only found on and around the Antarctic continent, on the thick pack ice and rarely on mainland. They have a pale yellow, open (breast and chin patch are one) patch on chin and breast. A long, thin and curved bill, typical for fish eaters. Very dark grey back and blue black head.
Aptenodytes patagonicus. The above picture was taken at Indianapolis zoo, in April, 2001. Look at the dinosaur-like feet of this penguin, indicating its evolutionary ancestors. Note that the two shorter penguins with the different plumage and pink feet belong to a different species, the Rockhopper Penguin.King penguins live in the shores of Antarctica, eating small fish and squids. They are excellent divers, and can stay over an hour in the water to find food.A colony of King penguins may consist of over a million individuals.ptenodytes patagonicus. The above picture was taken at Indianapolis zoo, in April, 2001. Look at the dinosaur-like feet of this penguin, indicating its evolutionary ancestors. Note that the two shorter penguins with the different plumage and pink feet belong to a different species, the Rockhopper Penguin.