With global warming looming over the lives of Antarctic penguins, Japanese researchers have conducted population surveys for more than half a century to understand shifting dynamics.
Discover Wildlife on MSN
Aardvark, angel shark, axolotls... 23 amazing animals starting with 'A'
From the adorable aardvark to the mysterious aye-aye, here are 22 animals starting with 'a' ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results