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.
Finally, the largest and most popular penguins belong to the genus Aptenodytes. Emperor Penguins (Aptenodytes forsteri) and King Penguins (Aptenodytes patagonicus) are tall, graceful birds with long, thin bills and striking orange color patches on their necks and lower bills.etâs take a quick tour of the extant penguin genera. Spheniscus is the genus for âtuxedo penguinsâ. Although all penguins look at least a bit like they are wearing tuxedos, Spheniscus penguins look finest of all because they have a black band of chest feathers that gives the appearance of a bow tie.